Trevally: Crevalle Jack


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Crevalle Jack (Caranx hippos) and Pacific Crevalle Jack (Caranx caninus) are two members of the Trevally (Carangidae) family that are almost identical in appearance and were formerly thought to be the same species. Both species are greenish on the back and silvery or yellowish on the belly, with prominent black spots on the gill covers and the base their pectoral fins. They have deep, elongated and slightly compressed body, high, rounded profile, as well as a large mouth. The two species are distinguished externally from each other only by the maximum number of scutes on their lateral line, 26 to 35 on the Crevalle Jack and up to 42 on the Pacific Crevalle Jack.

Crevalle Jacks occur in the Eastern Atlantic from Portugal to Angola, including the western Mediterranean and in the Western Atlantic from Nova Scotia, Canada and northern Gulf of Mexico to Uruguay. Pacific Crevalle Jack occur in the Eastern Pacific from San Diego, California, USA to Peru, including the Gulf of California and the Galapagos Islands.

Crevalle Jacks feed on crustacean, smaller fish and other invertebrates. They will often corner a school of smaller fish at the surface and feed voraciously, or chase after their prey onto beaches and against seawalls.