The green jobfish (''Aprion virescens''), also known as the gray jobfish, gray snapper,
/ref> or slender snapper, and in Hawaiian as ''uku'', is a species of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or hor ...

, a snapper belonging to the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Lutjanidae Lutjanidae, or snappers are a family of perciform fish, mainly marine, but with some members inhabiting estuaries, feeding in fresh water. The family includes about 113 species. Some are important food fish. One of the best known is the red snapp ...

. It is found in the Indo-Pacific region. This species inhabits various

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 processes— deposition of sand, wave erosion planing down rock out ...

environments at depths from near the surface to . It is a very important species for local

commercial fisheries Commercial fishing is the activity of catching fish and other seafood for commercial profit, mostly from wild fisheries. It provides a large quantity of food to many countries around the world, but those who practice it as an industry must often ...

and is popular as a

game fish Game fish, sport fish or quarry refer to popular fish pursued by recreational anglers, and can be freshwater or saltwater fish. Game fish can be eaten after being caught, or released after capture. Some game fish are also targeted commerciall ...

, though it has been reported to cause

ciguatera Ciguatera fish poisoning (CFP), also known simply as ciguatera, is a foodborne illness caused by eating reef fish whose flesh is contaminated with certain toxins. Such individual fish are said to be ciguatoxic. Symptoms may include diarrhea, vomi ...

poisoning. It can also be found in the

aquarium An aquarium (plural: ''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. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...

trade. This species is the only known member of its

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

Description

The green jobfish is a robust fish with has an elongate body which is cylindrical in

cross-section Cross section may refer to: * Cross section (geometry) ** Cross-sectional views in architecture & engineering 3D *Cross section (geology) * Cross section (electronics) * Radar cross section, measure of detectability * Cross section (physics) **Ab ...

. The head is also elongate with a blunt snout, with an obvious longitudinal groove running from the snout to the eye and it has a deeply forked

caudal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

. The teeth in the jaws are arranged in bands with 2 distinct canines at the front. The

vomerine teeth The vomer (; lat, vomer, lit=ploughshare) is one of the unpaired facial bones of the skull. It is located in the midsagittal line, and articulates with the sphenoid, the ethmoid, the left and right palatine bones, and the left and right maxill ...

are set out in a crescent shaped patch. The

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through conv ...

contains 10 spines and 11 soft rays while the

anal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

has 3 spines and 8 soft rays. The overall colour of the body is dark green to bluish, fading towards the abdomen. The spiny part of the dorsal fin has black spots at the base of the five rearmost spines. This species attains a maximum total length of , although is more typical, and a maximum published weight of .

Distribution

The green jobfish has a wide Indo-Pacific distribution. It extends from the

Red Sea The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; T ...

and the eastern coast of Africa as far south as northeastern South Africa and across the Indian Ocean into the Pacific Ocean where it is found north to southern Japan, south to Australia and

Rapa Iti Rapa, also called Rapa Iti, or "Little Rapa", to distinguish it from Easter Island, whose Polynesian name is Rapa Nui, is the largest and only inhabited island of the Bass Islands in French Polynesia. An older name for the island is Oparo. The ...

and east to

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...

. In Australia it occurs from Australian waters from northwestern Australia the

Ningaloo Reef The Ningaloo Coast is a World Heritage Site located in the north west coastal region of Western Australia. The heritage-listed area is located approximately north of Perth, along the East Indian Ocean. The distinctive Ningaloo Reef that fring ...

Rowley Shoals The Rowley Shoals is a group of three atoll-like coral reefs south of the Timor Sea, about west of Broome on the northwestern Australian coast, centered on , on the edge of one of the widest continental shelves in the world. Each atoll cover ...

, Scott Reef and

Ashmore Ashmore is a village and civil parish in the North Dorset district of Dorset, England, southwest of Salisbury. The village is centred on a circular pond and has a church and several stone cottages and farms, many with thatched roofs. It is ...

and

Cartier Islands Cartier Island is an uninhabited and unvegetated sand cay in a platform reef in the Timor Sea north of Australia and south of Indonesia. It is within the Territory of Ashmore and Cartier Islands, an external territory of Australia. The land area ...

in the

Timor Sea The Timor Sea ( id, Laut Timor, pt, Mar de Timor, tet, Tasi Mane or ) is a relatively shallow sea bounded to the north by the island of Timor, to the east by the Arafura Sea, and to the south by Australia. The sea contains a number of reefs, ...

and from the northern

Great Barrier Reef The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over over an area of approximately . The reef is located in the Coral Sea, off the coast of Queensland, ...

of Queensland south to

Wooli Adam Puleo, better known by his alias Wooli, is an American riddim and dubstep DJ and producer. He is known for the songs "Island" and " Another Me", with the prior being a collaboration with American dubstep producers Seven Lions and Trivecta an ...

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

. It is also found at

Lord Howe Island Lord Howe Island (; formerly Lord Howe's Island) is an irregularly crescent-shaped volcanic remnant in the Tasman Sea between Australia and New Zealand, part of the Australian state of New South Wales. It lies directly east of mainland P ...

Middleton Reef Middleton Reef is a coral reef in the Coral Sea. It is separated by a deep oceanic pass some 47 km wide from nearby Elizabeth Reef, forming part of the Lord Howe Rise underwater plateau. It is around 230 km from Lord Howe Island and 5 ...

Christmas Island Christmas Island, officially the Territory of Christmas Island, is an Australian external territory comprising the island of the same name. It is located in the Indian Ocean, around south of Java and Sumatra and around north-west of the ...

and

Cocos (Keeling) Island ) , anthem = "''Advance Australia Fair''" , song_type = , song = , image_map = Australia on the globe (Cocos (Keeling) Islands special) (Southeast Asia centered).svg , map_alt = Location of the Cocos (Keeling) Islands , map_caption = ...

Habitat and biology

The green jobfish is a

benthopelagic The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer of ...

fish of open waters of deep lagoons, channels, or seaward reefs at depths from the surface down to . It is typically encountered singly but they may aggregate into small schools. It diet is dominated by fishes but it is also known to feed on crustaceans, cephalopods and zooplankton. This species has been observed to

spawn Spawn or spawning may refer to: * Spawn (biology), the eggs and sperm of aquatic animals Arts, entertainment, and media * Spawn (character), a fictional character in the comic series of the same name and in the associated franchise ** '' Spawn: Ar ...

in May to October off Hawaii and it is known that they are multiple spawners. They reach sexual maturity at 4.5 years, when the females are around in length.

Taxonomy

The green jobfish was first formally described in 1830 by the French zoologist Achille Valenciennes with the type locality given as the Seychelles. It is the only species in the genus ''Aprion''. The generic name Aprion is a compound of ''a'' meaning “without” and ''prion'' meaning “ saw”, a reference to the unserrated

preoperculum This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes. A B C ...

. The specific name ''virescens'' means “greenish” referring to the overall colour of the body.

Fisheries

The green jobfish is considered to have good quality flesh and is an important part of some subsistence fisheries. It is commonly sold fresh in many fish markets, but also preserved by drying and salting. In Hawaii it is one of the four most important species of snapper for fisheries, one of the prime quarry fish for the handlines bottom fishery and it is managed as part of the bottom fish management unit. It is one of the most important quarry species throughout its range and in 2010 the catch was . Larger individuals can be dangerous to eat because they are known to be a cause of

poisoning in humans. it is also a popular quarry in sports fishing and is sometimes found in the

trade.

References

External links

* {{Taxonbar, from=Q1958850 Etelinae Fish of Hawaii Marine fish of Australia Fish described in 1830