Alectis Ciliaris
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The African pompano (''Alectis ciliaris''), also known as the pennant-fish or threadfin trevally, is a widely distributed species of tropical marine fish in the jack family,
Carangidae The Carangidae are a family of ray-finned fish that includes the jacks, pompanos, jack mackerels, runners, trevallies, and scads. It is the largest of the six families included within the order Carangiformes. Some authorities classify it as the ...
. The species is found in tropical waters worldwide, with adults often inhabiting
coastline A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...
s, while juveniles are usually
pelagic The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the sur ...
, floating with
ocean current An ocean current is a continuous, directed movement of seawater generated by a number of forces acting upon the water, including wind, the Coriolis effect, breaking waves, cabbeling, and temperature and salinity differences. Depth contours, sh ...
s. The adult African pompano is similar in appearance to the other members of the genus ''
Alectis ''Alectis'' is a genus of fish in the family (biology), family Carangidae containing three Extant taxon, extant species, all of which are large Marine (ocean), marine fishes. They are commonly known as threadfish, diamond trevallies or pompanos, ...
'', with the concave shape of the head near the
eye An eye is a sensory organ that allows an organism to perceive visual information. It detects light and converts it into electro-chemical impulses in neurons (neurones). It is part of an organism's visual system. In higher organisms, the ey ...
s; the clearest distinguishing feature. The juveniles are similar to other members of ''Alectis'', having long, filamentous
dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage The fus ...
and
anal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported o ...
tips which are thought to discourage
predator Predation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. It is one of a family of common List of feeding behaviours, feeding behaviours that includes parasitism and micropredation ...
s. The species lives in depths less than 100 m, consuming a range of
crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthrop ...
s and small fishes. The species is of minor economic importance, often taken amongst other tropical midwater fishes by hook and line, while juveniles are occasionally caught in beach
seine The Seine ( , ) is a river in northern France. Its drainage basin is in the Paris Basin (a geological relative lowland) covering most of northern France. It rises at Source-Seine, northwest of Dijon in northeastern France in the Langres plat ...
s. African pompano are also highly rated
game fish Game fish, sport fish or quarry refer to popular fish species pursued by recreational fishing, recreational fishers (typically angling, anglers), and can be freshwater fish, freshwater or saltwater fish. Game fish can be fish as food, eaten aft ...
, often considered one of the strongest of the jacks in larger sizes.


Taxonomy and naming

The Alectis ciliaris is one of three members of the diamond trevally
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 ...
''
Alectis ''Alectis'' is a genus of fish in the family (biology), family Carangidae containing three Extant taxon, extant species, all of which are large Marine (ocean), marine fishes. They are commonly known as threadfish, diamond trevallies or pompanos, ...
'', which itself is one of 33 genera in the jack and horse mackerel
family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Carangidae The Carangidae are a family of ray-finned fish that includes the jacks, pompanos, jack mackerels, runners, trevallies, and scads. It is the largest of the six families included within the order Carangiformes. Some authorities classify it as the ...
. The Carangidae are part of the
order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...
Carangiformes Carangiformes is a large, diverse order of ray-finned fishes within the clade Percomorpha. It is part of a sister clade to the Ovalentaria, alongside its sister group, the Anabantaria (including Anabantiformes and Synbranchiformes). The Cara ...
. This species is the
type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...
for the genus ''Alectis''. The species may have been first
scientifically described A species description is a formal scientific description of a newly encountered species, typically articulated through a scientific publication. Its purpose is to provide a clear description of a new species of organism and explain how it diffe ...
by
Carolus Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...
in 1758 as ''Zeus gallus'', known at the time from the Atlantic Ocean. Linnaeus classified the fish as a type of
dory Dory most commonly refers to: * Dory (boat), a small, shallow-draft boat * Dory, the common name of several fish; see List of fishes known as dory * Dory (''Finding Nemo''), a fictional character Dory may also refer to: Arts and entertainmen ...
, still known today under the genus name ''Zeus''. The name is ambiguous, because with only a very summary description and without a type specimen, it is unclear if he is actually referring to this species. In 1787 the German
naturalist Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is cal ...
Marcus Elieser Bloch Marcus Elieser Bloch (1723–1799) was a German physician and naturalist who is best known for his contribution to ichthyology through his multi-volume catalog of plates illustrating the fishes of the world. Brought up in a Hebrew-speaking Jewish ...
described a new species under the name of ''Zeus ciliaris'', described from a
type specimen In biology, a type is a particular wikt:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to ancho ...
collected from
Surat Surat (Gujarati Language, Gujarati: ) is a city in the western Indian States and territories of India, state of Gujarat. The word Surat directly translates to ''face'' in Urdu, Gujarati language, Gujarati and Hindi. Located on the banks of t ...
, India, which is a
junior synonym In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The botanical and zoological codes of nomenclature treat the concept of synonymy differently. ...
of Linnaeus' name. Following this description, a number of naturalists reclassified the species as the taxonomic literature of fishes grew in volume.
Bernard Germain de Lacépède Bernard-Germain-Étienne de La Ville-sur-Illon, comte de Lacépède or La Cépède (; 26 December 17566 October 1825) was a French natural history, naturalist and an active freemason. He is known for his contribution to the Comte de Buffon's g ...
was the first to do so, synonymising the two previous names under the new name ''Gallus virescens''. Although he had intended ''Gallus'' to be a new genus, this name had been assigned to a group of birds previously.
Rafinesque Constantine Samuel Rafinesque-Schmaltz (; 22 October 178318 September 1840) was a French early 19th-century polymath born near Constantinople in the Ottoman Empire and self-educated in France. He traveled as a young man in the United States, ult ...
renamed ''Gallus virescens'' in 1815, creating a new genus, ''Alectis'', for the
taxon In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and ...
, and designating this species as the type species for his new genus. Throughout much of history the obscure and somewhat insane works of Rafinesque were generally ignored by the scientific community. For example, another junior synonym, ''Zeus crinitus'', was named for US populations of this species by the American Samuel L. Mitchill in 1826. The scientist
Georges Cuvier Jean Léopold Nicolas Frédéric, baron Cuvier (23 August 1769 – 13 May 1832), known as Georges Cuvier (; ), was a French natural history, naturalist and zoology, zoologist, sometimes referred to as the "founding father of paleontology". Cuv ...
followed
Eduard Rüppell Wilhelm Peter Eduard Simon Rüppell, also spelled Rueppell (20 November 1794 – 10 December 1884) was a German Natural history, naturalist and List of explorers, explorer, best known for his collections and descriptions of plants and animals from ...
(1830) in classifying this fish in the genus ''Blepharis'' (which is also a plant) in 1833, and this fish was known as belonging to this genus for most of history. Nonetheless, Rafinesque had been first to reclassifying the fish (correctly), and as such his generic name has priority, which is why this species is known as ''Alectis'' today. A number of other biologists also reclassified the taxon, or named completely new species, such as ''Scyris analis'' and ''Carangoides ajax''. All names except ''Alectis ciliaris'' are now considered defunct according to the
ICZN The International Code of Zoological Nomenclature (ICZN) is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals. It is also informally known as the ICZN Code, for its formal author, t ...
rules. The original genus name of ''Zeus'' has now also been applied to an
ascomycete Ascomycota is a phylum of the kingdom Fungi that, together with the Basidiomycota, forms the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. It is the largest phylum of Fungi, with over 64,000 species. The def ...
fungi (this is permitted under the rules, because a fungus is not an animal). The Africanus pompanus is not a true
pompano Pompanos ( ) are saltwater fish, marine fish in the genus ''Trachinotus'' in the family (biology), family Carangidae (better known as "slabs"). Pompano may also refer to various other, similarly shaped members of the Carangidae, or the Order (bi ...
of the genus ''Trachinotus'', but is more closely allied with the fish commonly called jacks and trevallies. The various common names used for the species generally reflect the juvenile filamentous fins, with a number of variations on 'threadfin trevally' often used.


Description

Like many of the Carangidae, the African pompano is a deep and laterally compressed fish, with the deepest point of the body located between the origin of the
dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage The fus ...
and
anal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported o ...
s and having the head and tail tapering either side. The
dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage The fus ...
and
ventral Standard anatomical terms of location are used to describe unambiguously the anatomy of humans and other animals. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position prov ...
profiles are equally
convex Convex or convexity may refer to: Science and technology * Convex lens, in optics Mathematics * Convex set, containing the whole line segment that joins points ** Convex polygon, a polygon which encloses a convex set of points ** Convex polytop ...
, with a major distinguishing feature of the adult being its more curved head compared to '' Alectis indicus'' more angular head profile. The species has four to seven visible spines in the first dorsal fin followed by a single spine and 18 to 20
soft rays Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. In practice, fish anatomy and fish physiology co ...
in the second dorsal. The anal fin has two spines followed by 15 or 16 soft rays, while the
pectoral fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish aquatic locomotion, swim. Apart from the tail or caudal fin, fish fins have no direct connection with the vertebral column ...
is long and curved. The skin of the fish appears scaleless, but has minute, embedded
scales Scale or scales may refer to: Mathematics * Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number ...
scattered on the body. The
lateral line The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelia ...
has a strong and moderately long arch dorsally, with its posterior section having 12 to 30
scute A scute () or scutum (Latin: ''scutum''; plural: ''scuta'' "Scutum (shield), shield") is a bony external plate or scale overlaid with horn, as on the shell of a turtle, the skin of crocodilians, and the feet of Bird anatomy#Scales, birds. The ter ...
s. The juveniles are distinctive due to their 'threadfin' appearance of having trailing anal and dorsal fin filaments which recede with age. During maturation, the species also becomes more elongate and more like that of other genera of jacks. The body is a silvery-metallic blue to blue-green colour above, being darkest on the head and upper shoulders while the underside is more silvery. The juveniles have five chevron-shaped dark bars on their bodies, with a black blotch at the base of the third to sixth soft dorsal fin rays. The base of the filaments is a dark blue to black, with all other fins pale to
hyaline A hyaline substance is one with a glassy appearance. The word is derived from , and . Histopathology Hyaline cartilage is named after its glassy appearance on fresh gross pathology. On light microscopy of H&E stained slides, the extracellula ...
in appearance. The African pompano is known to definitely reach a length of 130 cm, although larger specimens to 150 cm have been reported, but are not considered reliable. The maximum published weight of the species is 22.9 kg.


Distribution and habitat

The African pompano is distributed throughout the tropical oceans and seas of the world in a temperature range of , although is more often found in
coastal A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...
waters. The species has been recorded from both the east and west coasts of the US, South America and Africa, throughout the Indian Ocean and along Asia and Australia, as well as many islands in the Pacific. The African pompano range into more
temperate In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ran ...
waters, with juveniles in particular captured off southeastern and western Australia, presumably carried by ocean currents. The adults of the species prefer coastal waters to depths of 100 m, inhabiting
reef A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic component, abiotic (non-living) processes such as deposition (geol ...
s and wrecks throughout the water column. Juveniles are
pelagic The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the sur ...
by nature, inhabiting coastal areas, as well as open ocean. Their reliance on water currents has seen them appear in
estuarine An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...
waters in lower Australia, although due to cold winter temperatures, they do not survive the winters. In one unusual case, the abundance in the species off
North Carolina North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. stat ...
was found to dramatically increase after a
hurricane A tropical cyclone is a rapidly rotating storm system with a low-pressure area, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depending on its ...
had passed through.


Ecology

The African pompano is a schooling
predator Predation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. It is one of a family of common List of feeding behaviours, feeding behaviours that includes parasitism and micropredation ...
y fish which takes predominantly a variety of
crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthrop ...
s, including
decapods The Decapoda or decapods, from Ancient Greek δεκάς (''dekás''), meaning "ten", and πούς (''poús''), meaning "foot", is a large order (biology), order of crustaceans within the class Malacostraca, and includes crabs, lobsters, crayfis ...
, carids and
copepod Copepods (; meaning 'oar-feet') are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (living in the water column), some are benthos, benthic (living on the sedimen ...
s, as well as
cephalopod A cephalopod is any member of the molluscan Taxonomic rank, class Cephalopoda (Greek language, Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral symm ...
s and small fish. They are preyed upon by larger fish, including mackerel and tunas, as well as
shark Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the ...
s. The small pelagic juveniles' filamentous dorsal and anal fins resemble
jellyfish Jellyfish, also known as sea jellies or simply jellies, are the #Life cycle, medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animal ...
medusae Jellyfish, also known as sea jellies or simply jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, althoug ...
, and this
mimicry In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species. Mimicry may evolve between different species, or between individuals of the same species. In the simples ...
may gain them some protection from predators. Little is known of their reproductive habits and maturation lengths, although a study in India determined a peak in the abundance of ''A. ciliaris'' larvae in April. The
egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the ...
s were also found to be spherical, pelagic with a
yolk Among animals which produce eggs, the yolk (; also known as the vitellus) is the nutrient-bearing portion of the egg whose primary function is to supply food for the development of the embryo. Some types of egg contain no yolk, for example bec ...
and oil globule present, with the
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 ...
e also extensively described in the report. It is thought that in Mexico spawning occurs over sandy substrates in spring.


Relationship to humans

The large size and good table fare offered by the African pompano have made the species popular with both
recreational Recreation is an activity of leisure, leisure being discretionary time. The "need to do something for recreation" is an essential element of human biology and psychology. Recreational activities are often done for enjoyment, amusement, or plea ...
and
commercial fishermen The fishing industry includes any industry or activity that takes, cultures, processes, preserves, stores, transports, markets or sells fish or fish products. It is defined by the Food and Agriculture Organization as including recreational, subsi ...
, although different sources rate the flesh quality differently. The species has been implicated in a number of
ciguatera Ciguatera fish poisoning (CFP), also known as ciguatera, is a foodborne illness caused by eating tropical reef fish contaminated with ciguatoxins. Such individual fish are said to be ciguatoxic. Symptoms may include diarrhea, vomiting, numbness ...
cases, suggesting larger fish should probably not be consumed. The attractive appearance of juveniles make them possible
aquarium An aquarium (: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. fishkeeping, Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquati ...
fish, but they do not survive well in captivity. Adult African pompano are most often taken by hook-and-line methods, such as
trolling In slang, a troll is a person who posts deliberately offensive or provocative messages online (such as in social media, a newsgroup, a internet forum, forum, a chat room, an Multiplayer video game, online video game) or who performs similar be ...
although they do not often make up a high percentage of catches. Juveniles are occasionally taken by beach
seine The Seine ( , ) is a river in northern France. Its drainage basin is in the Paris Basin (a geological relative lowland) covering most of northern France. It rises at Source-Seine, northwest of Dijon in northeastern France in the Langres plat ...
s. The species is marketed fresh and as dried and salted. The fighting prowess and good table fare attract anglers to the species in many parts of the world, with regions such as
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
,
Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...
and a number of Pacific and Indian Ocean islands having a strong recreational fishery for the species, Tackle for larger fish is more robust, with 50-lb line on a large overhead or threadline type
reel A reel is a tool used to store elongated and flexible objects (e.g. yarns/ cords, ribbons, cables, hoses, etc.) by wrapping the material around a cylindrical core known as a '' spool''. Many reels also have flanges (known as the ''rims'') arou ...
used to prevent the fish from taking cover in underwater structures on their first run, especially on reefs and wrecks. Smaller fish are often taken on light tackle, often requiring a skilled angler to be able to land the fish in these situations. They can be caught on both
bait Bait may refer to: General * Bait (luring substance), bait as a luring substance ** Fishing bait, bait used for fishing Film * ''Bait'' (1950 film), a British crime film by Frank Richardson * ''Bait'' (1954 film), an American noir film by Hugo ...
and
lures Loures () is a village on the island of Crete in Greece, located in the municipality of Gortyn (until 2011 in the municipality of Kofinas) of Heraklion regional unit, at the northern edge of the Messara Plain. It is by road south of Heraklion cit ...
, with small live baitfish or large
prawns Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs (members of the order of decapods), some of which are edible. The term ''prawn''Mortenson, Philip B (2010''This is not a weasel: a close look at nature's most ...
the choice of baits rigged on strong gauge hooks. Lures are often jigs or streamers worked on deep reefs and wrecks, although they have been known to take a trolled lure or rigged bait. In rare cases, they have even been known to take saltwater flies on sinking lines and poppers at the surface. The
IGFA The International Game Fish Association (''IGFA'') is the leading authority on angling pursuits and the keeper of the most current world record fishing catches by fish categories. Fishermen who are sport fishers and anglers are careful to follow ...
maintains a set of line and tippet class records from the United States for the African pompano. Their all tackle record for the species stands at taken off of
Daytona Beach, Florida Daytona Beach is a coastal Resort town, resort city in Volusia County, Florida, United States. Located on the East Coast of the United States, its population was 72,647 at the 2020 United States census, 2020 census. It is part of the Deltona ...
in 1990. An earlier (1986) recognized record for a recreationally caught fish in Australia was 18.8 kg. In Florida, the species has a minimum size limit of 24 inches and only two fish are allowed per vessel per day.


References


External links


African pompano (''Alectis ciliaris'')
a
The Australian MuseumAfrican pompano (''Alectis ciliaris'')
a
Encyclopaedia of Life
a
Champion Bass
{{Taxonbar, from=Q2802649 African pompano Pantropical fish African pompano Taxa named by Marcus Elieser Bloch