About This Fish

Bluefin Trevally


The bluefin trevally (Caranx melampygus) ia also known as the bluefin jack, bluefin kingfish, bluefinned crevalle, blue ulua, omilu and spotted trevally. It belongs to family Carangidae under Order Perciformes of Class Actinopterygii. It is distributed throughout the tropical waters of the Indian and Pacific Oceans, ranging from Eastern Africa in the west to Central America in the east, including Japan in the north and Australia in the south. It inhabits inshore environments such as bays, lagoons and shallow reefs, as well as deeper offshore reefs, atolls and bomboras.



Body is oblong and laterally compressed. Dorsal profile is moderately convex while ventral profile is nearly straight. Lateral line is moderately arched anteriorly and straight below 6th dorsal ray. Head and dorsal half of the body is grey to brassy, bluish and is covered with small blue-black spots while ventral part is silvery. The second dorsal, caudal and anal fins are blue. In juveniles, the head and body are silvery gray and pectorals are yellowish. Dorsal fin has two parts, of which, the first one with 8 spines while the second part with 1 spine followed by 21 -24 soft rays. The anal fin has 3 spines with 17 -24 soft rays while the pelvic fin contains 1 spine and 20 soft rays. The caudal fin is strongly forked and the pectoral fin is falcate. The chest is completely covered with scales. It grows up to 117 cm in length and 43 kg in weight. It is a strong predatory fish and its diet consists of fish, cephalopods and crustaceans . 


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Fiji