Bigeye trevally

Bigeye trevally
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Carangiformes
Family:	Carangidae
Genus:	Caranx
Species:	C. sexfasciatus
Binomial name
Caranx sexfasciatus Quoy & Gaimard, 1825
Approximate range of the bigeye trevally
Synonyms[2]
Caranx belengerii Cuvier, 1833 Caranx forsteri Cuvier, 1833 Caranx peronii Cuvier, 1833 Caranx xanthopygus Cuvier, 1833 Caranx flavocoeruleus Temminck & Schlegel, 1844 Caranx paraspistes Richardson, 1848 Caranx tapeinosoma Bleeker, 1856 Carangus marginatus Gill, 1863 Caranx marginatus (Gill, 1863) Carangus rhabdotus Jenkins, 1903 Carangus elacate Jordan & Evermann, 1903 Caranx elacate (Jordan & Evermann, 1903) Caranx thompsoni Seale, 1905 Caranx butuanensis Seale, 1910 Caranx oshimai Wakiya, 1924

The bigeye trevally (Caranx sexfasciatus), also known as the bigeye jack, great trevally, six-banded trevally and dusky jack, is a species of widespread large marine fish classified in the jack family Carangidae. The bigeye trevally is distributed throughout the tropical waters of the Indian and Pacific Oceans, ranging from South Africa in the west to California and Ecuador in the east, including Australia to the south and Japan in the north. The bigeye trevally is best distinguished by its colouration, having a dark second dorsal fin with a white tip on the lobe, and also possessing a small dark spot on the operculum. Other more detailed anatomical features also set the species apart from other members of Caranx. The species is known to grow to a length of 120 cm and 18 kg.

It is predominantly an inshore fish, inhabiting reefs down to depths of around 100 m in both coastal zones and offshore islands, often venturing into estuaries and sandy bays as juveniles. The bigeye trevally is commonly found in large slow moving schools during the day, becoming active at night when it feeds, taking a variety of fish, crustaceans, cephalopods and other invertebrates. The fish is known to move from a more crustacean dominated diet as a juvenile to a nearly completely fish dominated diet as an adult. Sexual maturity is reached at 42 cm, with spawning occurring in large aggregations occurring at different periods throughout its range, generally between July and March. The bigeye trevally is of moderate importance to fisheries throughout its range, and being of high importance to some artisanal fisheries. It is taken by gill net, purse seine, hook and line and other artisanal fishing methods. It is rated as a fair to good table fish. The species is also considered a good gamefish, taken by lure, bait and spear throughout its range.