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Pteraster Militaris
''Pteraster militaris'', the wrinkled star, is a species of starfish in the family (biology), family Pterasteridae. It is found in the northern Pacific Ocean, the Arctic Ocean, the Barents Sea, and the northern Atlantic Ocean. Description ''Pteraster militaris'' is a robust starfish with a wide disc, a large central pore and five short, wrinkled, triangular arms. The aboral (upper) surface is dotted with papulae, each topped with four short spines and above this is a papery covering giving the starfish an inflated, bulky appearance. It grows to a diameter of and is usually orange, pale yellow or white, sometimes with red tips to its arms. Distribution ''Pteraster militaris'' is found in rocky habitats in water down to a depth of in the Arctic Ocean, the Bering Sea, the north west Pacific Ocean as far south as Oregon, the Barents Sea and the north east and north west Atlantic Ocean. Biology ''Pteraster militaris'' feeds on various species of sponge including the cloud sponge (' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphrocallistes Vastus
The cloud sponge ''(Aphrocallistes vastus)'', also known as the quesadilla sponge, is a species of sea sponge in the class Hexactinellida. It is a deep-water reef-forming animal. The species was first described by F.E. Schulze in 1886. Description The cloud sponge takes the form of a large cup with an irregularly folded wall about thick. This is pierced by many pores about wide and covered by a thin dermal membrane. The skeletal elements form a lattice-like structure made up of fused spicules of silica. These mesh together and project into the adjoining canals. There is a fir-tree like concentration of spicules running through the body wall with the branches either having rounded or knobbly ends. The form of the sponge varies according to the location in which it is found. The quesadilla sponge's common name derives from a morphological variation first observed in the Olympic Coast National Marine Sanctuary. It often has a mitten-like structure or may be tall and cylindrical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ectoparasite
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of life. The entomologist E. O. Wilson characterised parasites' way of feeding as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as Armillaria mellea, honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the Orobanchaceae, broomrapes. There are six major parasitic Behavioral ecology#Evolutionarily stable strategy, strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), wikt:trophic, trophicallytransmitted parasitism (by being eaten), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plankton
Plankton are the diverse collection of organisms that drift in Hydrosphere, water (or atmosphere, air) but are unable to actively propel themselves against ocean current, currents (or wind). The individual organisms constituting plankton are called plankters. In the ocean, they provide a crucial source of food to many small and large aquatic organisms, such as bivalves, fish, and baleen whales. Marine plankton include bacteria, archaea, algae, protozoa, microscopic fungi, and drifting or floating animals that inhabit the saltwater of oceans and the brackish waters of estuaries. fresh water, Freshwater plankton are similar to marine plankton, but are found in lakes and rivers. Mostly, plankton just drift where currents take them, though some, like jellyfish, swim slowly but not fast enough to generally overcome the influence of currents. Although plankton are usually thought of as inhabiting water, there are also airborne versions that live part of their lives drifting in the at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylaster Norvigicus
''Stylaster'' is a genus of hydroids in the family Stylasteridae. Species The following species are classed in this genus: * '' Stylaster alaskanus'' Fisher, 1938 * '' Stylaster amphiheloides'' Kent, 1871 * '' Stylaster antillarum'' Zibrowius & Cairns, 1982 * †'' Stylaster antiquus'' Sismondi, 1871 * '' Stylaster asper'' Kent, 1871 * '' Stylaster atlanticus'' Broch, 1936 * '' Stylaster aurantiacus'' Cairns, 1986 * '' Stylaster bellus'' (Dana, 1848) * '' Stylaster bilobatus'' Hickson & England, 1909 * '' Stylaster bithalamus'' Broch, 1936 * '' Stylaster blatteus'' (Boschma, 1961) * '' Stylaster bocki'' Broch, 1936 * '' Stylaster boreopacificus'' Broch, 1932 * '' Stylaster boschmai'' (Eguchi, 1965) * '' Stylaster brochi'' (Fisher, 1938) * '' Stylaster brunneus'' Boschma, 1970 * '' Stylaster californicus'' (Verrill, 1866) * '' Stylaster campylecus'' (Fisher, 1938) * '' Stylaster carinatus'' Broch, 1936 * †'' Stylaster chibaensis'' Eguchi, 1954 * '' Stylaster cocosensis'' Cai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrozoa
Hydrozoa (hydrozoans; from Ancient Greek ('; "water") and ('; "animals")) is a taxonomy (biology), taxonomic class (biology), class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colony (biology), colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genus, genera within this class live in freshwater ecosystem, freshwater habitats. Hydrozoans are related to jellyfish and corals, which also belong to the phylum (biology), phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly (''Craspedacusta sowerbyi''), freshwater polyps (''Hydra (genus), Hydra''), ''Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), and pink-hearted hydroids (''Tubularia''). Anatomy Most hydrozoan species include both a polyp (zoology), polypoid and a medusa (biology), medusoid stage in their Biological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iophon Cheliferum
''Iophon cheliferum'', also known as the white reticulated sponge, is a species of sea sponge which lives on the bottom of the ocean. It is a deep water species found in the south eastern Pacific Ocean and South Africa. Distribution ''Iophon cheliferum'' is found in deep water on the continental shelf of South Africa and Namibia, the Agulhas Bank off the southern tip of Africa, the Crozet Islands and Prince Edward Islands. It was first described by Ridley and Dendy from the over 4000 new species collected during the Challenger expedition of 1873-1976 which was the first expedition to study deep water organisms and the ocean depths. A variety, ''Iophon cheliferum var. californiana'' de Laubenfels, 1932 is found in the Galapagos Islands and north west Pacific but this has been synonym A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42nd parallel north, 42° north parallel delineates the southern boundary with California and Nevada. The western boundary is formed by the Pacific Ocean. Oregon has been home to many Indigenous peoples of the Americas, indigenous nations for thousands of years. The first European traders, explorers, and settlers began exploring what is now Oregon's Pacific coast in the early to mid-16th century. As early as 1564, the Spanish expeditions to the Pacific Northwest, Spanish began sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. In 1592, Juan de Fuca undertook detailed mapping a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starfish
Starfish or sea stars are Star polygon, star-shaped echinoderms belonging to the class (biology), class Asteroidea (). Common usage frequently finds these names being also applied to brittle star, ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropics, tropical zones to frigid, polar regions of Earth, polar regions. They are found from the intertidal zone down to abyssal zone, abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bering Sea
The Bering Sea ( , ; rus, Бе́рингово мо́ре, r=Béringovo móre, p=ˈbʲerʲɪnɡəvə ˈmorʲe) is a marginal sea of the Northern Pacific Ocean. It forms, along with the Bering Strait, the divide between the two largest landmasses on Earth: Eurasia and the Americas. It comprises a deep water basin, which then rises through a narrow slope into the shallower water above the continental shelf, continental shelves. The Bering Sea is named after Vitus Bering, a Denmark, Danish-born Russia, Russian navigator, who, in 1728, was the first European to systematically explore it, sailing from the Pacific Ocean northward to the Arctic Ocean. The Bering Sea is separated from the Gulf of Alaska by the Alaska Peninsula. It covers over and is bordered on the east and northeast by Alaska, on the west by the Russian Far East and the Kamchatka Peninsula, on the south by the Alaska Peninsula and the Aleutian Islands and on the far north by the Bering Strait, which connects the Berin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papula
Papulae (sing. papula; also occasionally papulla, papullae), also known as dermal branchiae or skin gills, are projections of the coelom of Asteroidea that serve in respiration and waste removal. Papulae are soft, covered externally with the epidermis, and lined internally with peritoneum. They extend through the mesodermal ossicles and are protected from microscopic larvae by pedicellariae A pedicellaria (: pedicellariae) is a small wrench- or claw-shaped appendage with movable jaws, called valves, commonly found on echinoderms (phylum Echinodermata), particularly in sea stars (class Asteroidea) and sea urchins (class Echinoidea). .... In a living specimen, the dermal gills can be extended or withdraw. References Echinoderm anatomy {{echinoderm-anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
