About This Fish

Crevalle Jack

The crevalle jack (Caranx hippos) is a ray finned fish which is also known as the common jack, black-tailed trevally, couvalli jack, black cavalla, Jack, Jackfish and yellow cavalla. It belongs to family Carangidae under Order Perciformes of Class Actinopterygii. It is distributed across the tropical and temperate waters of the Atlantic Ocean ranging from Nova Scotia, Canada to Uruguay in the west Atlantic and Portugal to Angola in the east Atlantic including the Mediterranean Sea. It inhabits both inshore and offshore waters over reefs, bays, lagoons and occasionally estuaries.

The body is elongated and moderately compressed, of which, the dorsal profile is more convex than the ventral profile. The dorsal fin has two parts; the first part consists of 8 spines while the second part has one spine with 19 - 21 soft rays. The anal fin has two anteriorly detached spines which followed by one spine with 16- 17 soft rays. The pelvic fin contains one spine and five soft rays while the pectoral fin bears 20 -21 soft rays. The caudal fin is strongly forked and the pectoral fin is falcate which is longer than the length of the head. Body color varies from brassy green to blue or bluish-black dorsally and silvery white or golden ventrally. A dark spot is present on the pectoral fin and operculum also has dark to dusky spot on the upper margin. The first dorsal fin, pectoral and pelvic fins are white to dusky. The anal fin lobe is bright yellow while the caudal fin is golden to dusky. It is a powerful predatory fish which consumes a variety of small fish and invertebrates such as prawns, shrimps, crabs, mollusks and cephalopods. Male reaches sexual maturity at 4-5 years of age while female at 5-6 years of age. It grows up to 124 cm in length and 32 kg in weight and it can live up to 17 years.


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St Lucia