The skipjack trevally (''Pseudocaranx wrighti'') or sand trevally is a species of

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

in the

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 jacks, trevallies,

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 ...

s, and scads. It is found in the eastern Indian Ocean around Australia.

Description

The skipjack trevally is steely blue in colour with an obvious, sharply demarcated, all-black spot with on the upper margin of the operculum, which has roughly the same diameter as the pupil. 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 are dusky green in colour and lack any yellow colouration. The body is not marked with any other markings. The juveniles are marked with thin, grey bands along their flanks. It is the smallest member of the genus ''

Pseudocaranx ''Pseudocaranx'' is a genus of ray-finned fishes from the family Carangidae, the jacks, trevallies, scads, and pompanos. They occur in the western Atlantic Ocean and the Indo-Pacific. Species Four recognized species are placed in this genus: * ' ...

'', which rarely grows longer than a

fork length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured fr ...

of .

Distribution

The skipjack trevally is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to Australia, where it occurs from southern

New South Wales New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...

and the

Bass Strait Bass Strait () is a strait separating the island state of Tasmania from the Mainland Australia, Australian mainland (more specifically the coast of Victoria (Australia), Victoria, with the exception of the land border across Boundary Islet). The ...

between

Victoria Victoria most commonly refers to: * Queen Victoria (1819–1901), Queen of the United Kingdom and Empress of India * Victoria (state), a state of Australia * Victoria, British Columbia, Canada, a provincial capital * Victoria, Seychelles, the capi ...

and

Tasmania Tasmania (; palawa kani: ''Lutruwita'') is an island States and territories of Australia, state of Australia. It is located to the south of the Mainland Australia, Australian mainland, and is separated from it by the Bass Strait. The sta ...

to the waters around

Rottnest Island Rottnest Island (), often colloquially referred to as "Rotto", is a Islands of Perth, Western Australia, island off the coast of Western Australia, located west of Fremantle. A sandy, low-lying island formed on a base of aeolianite limestone, ...

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

. Also, a specimen was recorded from as far north as the

Exmouth Gulf Exmouth Gulf is a Bay, gulf in the North West Australia, north-west of Western Australia. It lies between North West Cape and the main coastline of Western Australia. It is considered to be part of the Pilbara Coast and Northwest Shelf, and t ...

, which may represent an instance of

vagrancy Vagrancy is the condition of wandering homelessness without regular employment or income. Vagrants usually live in poverty and support themselves by travelling while engaging in begging, waste picker, scavenging, or petty theft. In Western ...

Habitat and biology

The skipjack trevally is a coastal species; the adults are found over sandy substrates and seagrass and often enter estuaries. The juveniles occur in large schools and are often caught in considerable numbers by fisheries targeting prawns. This is a relatively short-lived species, where the average age is five years.

Taxonomy and etymology

The skipjack trevally was described in 1931 as ''Usacaranx georgianus wrighti'' by

Gilbert Percy Whitley Gilbert Percy Whitley (9 June 1903 – 18 July 1975) was a British-born Australian ichthyologist and malacologist who was curator of fishes at the Australian Museum in Sydney for about 40 years. Early life and education Gilbert Percy Whitley ...

with the type locality given as "40 miles west of Kingston, South Australia, depth 30 fathoms". The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

honours J.H. Wright, who may be the same J.H. Wright who was a

taxidermist Taxidermy is the art of preserving an animal's body by mounting (over an armature) or stuffing, for the purpose of display or study. Animals are often, but not always, portrayed in a lifelike state. The word ''taxidermy'' describes the process ...

at the

Australian Museum The Australian Museum, originally known as the Colonial Museum or Sydney Museum. is a heritage-listed museum at 1 William Street, Sydney, William Street, Sydney central business district, Sydney CBD, New South Wales. It is the oldest natural ...

in 1908-1916.

References

{{Taxonbar, from=Q2545154 Fish described in 1931

Skipjack trevally The skipjack trevally (''Pseudocaranx wrighti'') or sand trevally is a species of ray-finned fish in the family Carangidae, the jacks, trevallies, pompanos, and scads. It is found in the eastern Indian Ocean around Australia. Description The ski ...

Taxobox binomials not recognized by IUCN