''Nereis'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

polychaete Polychaeta () is a paraphyletic class of generally marine Annelid, annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called c ...

worm Worms are many different distantly related bilateria, bilateral animals that typically have a long cylindrical tube-like body, no limb (anatomy), limbs, and usually no eyes. Worms vary in size from microscopic to over in length for marine ...

s in the family

Nereididae Nereididae (formerly spelled Nereidae) are a family of polychaete worms. It contains about 500 - mostly-marine - species grouped into 42 genera. They may be commonly called ragworms or clamworms. Characteristics The prostomium of Nereididae be ...

. It comprises many species, most of which are marine. ''Nereis'' possess

setae In biology, setae (; seta ; ) are any of a number of different bristle- or hair-like structures on living organisms. Animal setae Protostomes Depending partly on their form and function, protostome setae may be called macrotrichia, chaetae ...

and

parapodia In invertebrates, the term parapodium ( Gr. ''para'', beyond or beside + ''podia'', feet; : parapodia) refers to lateral outgrowths or protrusions from the body. Parapodia are predominantly found in annelids, where they are paired, unjointed late ...

for locomotion and gas exchange. They may have two types of setae, which are found on the parapodia. Acicular setae provide support. Locomotor setae are for crawling, and are the bristles that are visible on the exterior of the Polychaeta. They are cylindrical in shape, found not only in sandy areas, and they are adapted to burrow. They often cling to seagrass (posidonia) or other grass on rocks and sometimes gather in large groups. Nereis worms are commonly known as rag worms or clam worms. The body is long, slender, and dorso-ventrally flattened, reaching a length of 5-30 cm. The head consists of two parts: a roughly triangular anterior lobe—the prostomium—and a posterior ring-like portion—the peristomium. The latter bears four pairs of tentacular cirri, dorsally two pairs of eyes, and ventrally a pair of short two-jointed palps.

Etymology

The scientific Latin genus name ''Nereis'' derives from the Ancient Greek Νηρηΐς : Nērēís (stem Νηρηΐδ- : Nērēid), a sea nymph.

Ecology

''Nereis'' are

osmoconformer Osmoconformers are marine organisms that maintain an internal environment which is isotonic to their external environment. This means that the osmotic pressure of the organism's cells is equal to the osmotic pressure of their surrounding environm ...

s. They are

dioecious Dioecy ( ; ; adj. dioecious, ) is a characteristic of certain species that have distinct unisexual individuals, each producing either male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproduction is ...

(individuals are male or female) and they release their

haploid Ploidy () is the number of complete sets of chromosomes in a cell (biology), cell, and hence the number of possible alleles for Autosome, autosomal and Pseudoautosomal region, pseudoautosomal genes. Here ''sets of chromosomes'' refers to the num ...

gametes into the water, a process called ''spawning''. Moreover, upon fertilization and

mitotic Mitosis () is a part of the cell cycle in eukaryotic cells in which replicated chromosomes are separated into two new nuclei. Cell division by mitosis is an equational division which gives rise to genetically identical cells in which the t ...

divisions of the

zygote A zygote (; , ) is a eukaryote, eukaryotic cell (biology), cell formed by a fertilization event between two gametes. The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information of a new individ ...

, Nereids form a larval stage which is similar to that of

molluscs Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

– i.e. a

trochophore A trochophore () is a type of free-swimming planktonic marine larva with several bands of cilia. By moving their cilia rapidly, they make a water eddy to control their movement, and to bring their food closer in order to capture it more easily. ...

larva A larva (; : larvae ) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects, some arachnids, amphibians, or cnidarians typically have a larval phase ...

Species

The genus ''Nereis'' contains the following species: *'' Nereis abbreviata'' Holly, 1935 *'' Nereis abyssa'' Imajima, 2009 *''

Nereis abyssicola ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' (Horst, 1924) *''

Nereis acustris ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Linnaeus, 1767 *''

Nereis aegyptia ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' (Savigny ''in'' Lamarck, 1818) *''

Nereis aestuarensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Knox, 1951 *''

Nereis aibuhitensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' (Grube, 1878) *''

Nereis albipes ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Grube, 1873 *''

Nereis allenae ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Pettibone, 1956 *''

Nereis amoyensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' (Treadwell, 1936) *''

Nereis angelensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Fauchald, 1972 *''

Nereis angusta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' (Kinberg, 1866) *'' Nereis angusticollis'' Augener, 1913 *'' Nereis angusticollis'' Kinberg, 1866 *'' Nereis annularis'' Blainville, 1818 *'' Nereis anoculis'' Hartman, 1960 *''

Nereis anoculopsis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Fauchald, 1972 *''

Nereis anodonta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Schmarda, 1861 *'' Nereis antipoda'' Knox, 1960 *'' Nereis apaliae'' Wilson, 1985 *''

Nereis arenaceodonta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' *'' Nereis arroyensis'' Treadwell, 1901 *'' Nereis atlantica'' McIntosh, 1885 *''

Nereis augeneri ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Gravier & Dantan, 1934 *'' Nereis badiotorquata'' (Grube, 1878) *''

Nereis baliensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' (Horst, 1924) *''

Nereis baolingi ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Leon-Gonzalez & Solis-Weiss, 2000 *'' Nereis batjanensis'' (Horst, 1924) *''

Nereis bifida ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hutchings & Turvey, 1982 *'' Nereis bipartita'' (Bobretzky, 1868) *'' Nereis blainvillei'' delle Chiaje, 1828 *''

Nereis broa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Lana & Sovierzovsky, 1987 *'' Nereis buitendijki'' (Horst, 1924) *''

Nereis caecoides ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartman, 1965 *'' Nereis caerulea'' Linnaeus, 1758 *''

Nereis cagliari ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Kinberg, 1866 *'' Nereis calamus'' Renier, 1804 *''

Nereis callaona ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Grube, 1857) *'' Nereis caparti'' Fauvel, 1953 *'' Nereis casoae'' Leon-Gonzalez & Solis-Weiss, 2001 *''

Nereis castelnaui ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Quatrefages, 1866 *'' Nereis caudata'' *'' Nereis caudipunctata'' (Grube, 1857) *''

Nereis caymanensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Fauchald, 1977 *''

Nereis chlorodes ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Blanchard ''in'' Gay, 1849 *'' Nereis chrysocephala'' Pallas, 1788 *''

Nereis cirrhigera ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Viviani, 1805 *''

Nereis cirriseta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hutchings & Turvey, 1982 *'' Nereis cockburnenesis'' Augener, 1913 *'' Nereis contorta'' Dalyell, 1853 *'' Nereis corallina'' Kinberg, 1866 *'' Nereis cornuta'' Quatrefages, 1866 *'' Nereis costaricaensis'' Dean, 2001 *'' Nereis coutieri'' Gravier, 1900 *'' Nereis coutieri'' Gravier, 1899 *''

Nereis crassa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Gmelin ''in'' Linnaeus, 1788 *''

Nereis crocea ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Renier, 1804 *'' Nereis cuprea'' delle Chiaje, 1822 *'' Nereis cuprea'' (Schmarda, 1861) *'' Nereis cylindraria'' *''

Nereis dakarensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Fauvel, 1951 *'' Nereis dayana'' Sun & Shen ''in'' Sun, Wu & Shen, 1978 *'' Nereis delagica'' Gmelin ''in'' Linnaeus, 1788 *'' Nereis delicatula'' Blanchard ''in'' Gay, 1849 *'' Nereis delli'' Knox, 1960 *''

Nereis denhamensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Augener, 1913 *''

Nereis donghaiensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' He & Wu, 1988 *''

Nereis dorsolobata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartmann-Schröder, 1965 *'' Nereis edwardsii'' delle Chiaje, 1828 *'' Nereis ehlersiana'' (Grube, 1878) *''

Nereis ehrenbergi ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Grube, 1868 *''

Nereis erythraeensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' *'' Nereis falcaria'' (Willey, 1905) *''

Nereis falsa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Quatrefages, 1866 *''

Nereis fauchaldi ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Leon-Gonzalez & Diaz-Castaneda, 1998 *'' Nereis fauveli'' Gravier & Dantan, 1934 *''

Nereis filicaudata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Fauvel, 1951 *'' Nereis foliosa'' Schmarda, 1861 *''

Nereis fossae ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Fauchald, 1972 *''

Nereis frontalis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Bosc, 1802 *''

Nereis funchalensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Langerhans, 1880) *'' Nereis fusifera'' Quatrefages, 1866 *'' Nereis garwoodi'' Gonzalez-Escalante & Salazar-Vallejo, 2003 *''

Nereis gayi ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Blanchard ''in'' Gay, 1849 *''

Nereis ghardaqae ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartmann-Schröder, 1960 *''

Nereis gigantea ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Linnaeus, 1767 *''

Nereis gisserana ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Horst, 1924) *''

Nereis goajirana ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Augener, 1933 *''

Nereis gracilis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Hansen, 1878) *''

Nereis granulata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Day, 1957 *'' Nereis gravieri'' Fauvel, 1900 *'' Nereis gravieri'' Fauvel, 1902 *'' Nereis grayi'' Pettibone, 1956 *'' Nereis grubei'' (Kinberg, 1866) *'' Nereis guangdongensis'' Wu, Sun & Yang, 1981 *''

Nereis heterocirrata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Treadwell, 1931 *''

Nereis heteromorpha ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Horst, 1924) *'' Nereis heterophylla'' Chamisso & Eysenhardt, 1821 *'' Nereis heteropoda'' Chamisso & Eysenhardt, 1821 *''

Nereis holochaeta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Intes & Le Loeuff, 1975 *'' Nereis homogompha'' Rullier, 1972 *'' Nereis huanghaiensis'' Wu, Sun & Yang, 1981 *''

Nereis icosiensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Gravier & Dantan, 1928 *'' Nereis ignota'' Quatrefages, 1866 *''

Nereis imajimai ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Leon-Gonzalez & Diaz-Castaneda, 1998 *''

Nereis imbecillis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Grube, 1840 *''

Nereis imperfecta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Gravier & Dantan, 1936 *'' Nereis inflata'' Leon-Gonzalez & Solis-Weiss, 2001 *''

Nereis iris ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Stimpson, 1854 *''

Nereis irrorata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' *'' Nereis izukai'' Okuda, 1939 *'' Nereis jacksoni'' Kinberg, 1866 *''

Nereis krebsii ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Grube, 1857 *'' Nereis lamellosa'' Ehlers, 1864 *''

Nereis languida ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Kinberg, 1866 *'' Nereis latescens'' Chamberlin, 1919 *''

Nereis leuca ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Chamberlin, 1919 *'' Nereis ligulata'' Hilbig, 1992 *''

Nereis lineata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' delle Chiaje, 1827 *'' Nereis lingulata'' Hilbig, 1992 *''

Nereis lithothamnica ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Annenkova, 1938 *'' Nereis litoralis'' Leach ''in'' Johnston, 1865 *''

Nereis longilingulis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Monro, 1937 *'' Nereis longior'' Chlebovitsch & Wu, 1962 *''

Nereis longisetis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' McIntosh, 1885 *''

Nereis macropis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Ehlers, 1920 *''

Nereis maculosa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Renier, 1804 *''

Nereis madreporae ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' *'' Nereis margarita'' Montagu, 1804 *''

Nereis marginata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Grube, 1857 *'' Nereis mariae'' Holly, 1935 *''

Nereis marioni ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Audouin & Milne-Edwards, 1833 *'' Nereis maroccensis'' Amoureux, 1976 *'' Nereis maxillodentata'' Hutchings & Turvey, 1982 *'' Nereis mediator'' Chamberlin, 1918 *''

Nereis mendocinana ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Chamberlin, 1919 *''

Nereis microcera ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Quatrefages, 1866 *''

Nereis minima ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Lamarck, 1801 *'' Nereis mirabilis'' Kinberg, 1866 *''

Nereis mollis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Linnaeus, 1761 *'' Nereis monoceros'' Dalyell, 1853 *'' Nereis monroi'' Reish, 1953 *''

Nereis moroccensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Amoureux, 1976 *'' Nereis mortenseni'' Augener, 1923 *''

Nereis multignatha ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Imajima & Hartman, 1964 *'' Nereis myersi'' Holly, 1935 *'' Nereis nancaurica'' Ehlers, 1904 *''

Nereis nanciae ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Day, 1949 *'' Nereis natans'' Hartman, 1936 *''

Nereis neoneanthes ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartman, 1948 *'' Nereis neozealanica'' Knox, 1951 *'' Nereis nichollsi'' Kott, 1951 *''

Nereis nigripes ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Ehlers, 1868 *''

Nereis noctiluca ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Linnaeus, 1761 *''

Nereis nouhuysi ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Horst, 1918 *'' Nereis obscura'' Gravier & Dantan, 1934 *''

Nereis ochotica ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Grube, 1850 *'' Nereis ockenii'' delle Chiaje, 1828 *'' Nereis octentaculata'' Montagu, 1804 *'' Nereis oligohalina'' (Rioja, 1946) *'' Nereis onychophora'' Horst, 1918 *'' Nereis otto'' delle Chiaje, 1828 *''

Nereis ovarius ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Read, 1980 *'' Nereis pachychaeta'' Fauvel, 1919 *'' Nereis panamensis'' Fauchald, 1977 *''

Nereis pannosa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Grube, 1857) *''

Nereis parabifida ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hutchings & Turvey, 1982 *'' Nereis paucignatha'' Hartman, 1940 *''

Nereis paulina ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Grube, 1868 *'' Nereis pectinata'' Dalyell, 1853 *''

Nereis pelagica ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Linnaeus, 1758 *''

Nereis perivisceralis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Claparède, 1868 *''

Nereis peroniensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Kott, 1951 *'' Nereis persica'' Fauvel, 1911 *'' Nereis peruviana'' Ehlers, 1868 *''

Nereis phosphorescens ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Quatrefages, 1866 *''

Nereis phyllophorus ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Ross, 1819 *''

Nereis pinnata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Müller, 1776 *'' Nereis piscesae'' Blake & Hillbig, 1990 *'' Nereis posidoniae'' Hutchings & Rainer, 1979 *''

Nereis procera ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Ehlers, 1868 *'' Nereis profundi'' Kirkegaard, 1956 *''

Nereis pseudomoniliformis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found ...

'' Santos & Lana, 2003 *'' Nereis pulsatoria'' (Savigny, 1822) *'' Nereis punctata'' Dalyell, 1853 *'' Nereis puncturata'' Grube, 1857 *''

Nereis quadricorna ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' delle Chiaje, 1841 *'' Nereis quoyii'' Quatrefages, 1866 *''

Nereis radiata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Viviani ''in'' Grube, 1850 *'' Nereis ranzani'' delle Chiaje, 1828 *'' Nereis rava'' Ehlers, 1864 *'' Nereis regia'' Quatrefages, 1866 *'' Nereis rigida'' Grube, 1857 *''

Nereis riisei ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Grube, 1857 *''

Nereis robusta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Quatrefages, 1866 *''

Nereis rufa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Pennant, 1812 *'' Nereis rupta'' Quatrefages, 1866 *''

Nereis sandersi ''Nereis sandersi'' is a species of sandworm in the family Nereididae Nereididae (formerly spelled Nereidae) are a family of polychaete worms. It contains about 500 - mostly-marine - species grouped into 42 genera. They may be commonly calle ...

'' Blake, 1985 *''

Nereis sarsoensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartmann-Schröder, 1960 *''

Nereis schmardae ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartmann-Schröder, 1962 *''

Nereis scolopendrina ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Blainville, 1825 *'' Nereis scolopendroides'' Hansen, 1882 *''

Nereis segrex ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Chamberlin, 1919 *'' Nereis semperiana'' (Grube, 1878) *''

Nereis serrata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Santos & Lana, 2003 *'' Nereis sertularias'' *''

Nereis sieboldii ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' Grube, 1873 *''

Nereis sinensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Wu, Sun & Yang, 1981 *'' Nereis singularis'' Wesenberg-Lund, 1949 *'' Nereis spinigera'' Hutchings & Turvey, 1982 *'' Nereis splendida'' Blainville, 1825 *'' Nereis splendida'' Grube, 1840 *''

Nereis sumbawaensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' (Horst, 1924) *'' Nereis surugaense'' Imajima, 1972 *''

Nereis talehsapensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Fauvel, 1932 *''

Nereis tenuipalpa ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Pflugfelder, 1933 *'' Nereis tenuis'' Webster & Benedict, 1884 *''

Nereis tethycola ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are ocean, marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are f ...

'' delle Chiaje, 1831 *'' Nereis thompsoni'' (Kott, 1951) *''

Nereis thysanota ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Ehlers, 1920 *''

Nereis tiedmanni ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' delle Chiaje, 1841 *'' Nereis tigrina'' Zachs, 1933 *''

Nereis toporoki ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Khlebovich, 1996 *''

Nereis torta ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Fauvel, 1934 *''

Nereis translucens ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Quatrefages, 1866 *'' Nereis triangularis'' Hutchings & Turvey, 1982 *'' Nereis tydemani'' (Horst, 1924) *'' Nereis uncia'' Holly, 1935 *''

Nereis usticensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Cantone, Catalono & Badalamenti, 2003 *'' Nereis variegata'' Renier, 1804 *''

Nereis veleronis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Hartman, 1940 *'' Nereis ventilabrum'' Quatrefages, 1866 *''

Nereis vexillosa ''Nereis vexillosa'', the mussel worm, belongs to the phylum Annelida, a group known as the segmented worms. It is generally iridescent green and can reach 30 cm in length. It can be distinguished by the size of the upper ligules on the noto ...

'' Grube, 1851 *'' Nereis victoriana'' Augener, 1918 *'' Nereis villosa'' Dalyell, 1853 *'' Nereis vitiensis'' Grube, 1870 *''

Nereis willey ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Day, 1934 *''

Nereis zhongshaensis ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Shen & Sun ''in'' Sun, Wu & Shen, 1978 *''

Nereis zonata ''Nereis'' is a genus of polychaete worms in the family Nereididae. It comprises many species, most of which are marine. ''Nereis'' possess setae and parapodia for locomotion and gas exchange. They may have two types of setae, which are found o ...

'' Malmgren, 1867

References

{{Taxonbar, from=Q135309 Polychaete genera Phyllodocida