Caranx hippos; Print; The crevalle jack (Caranx hippos); also known as the common jack; black-tailed trevally; couvalli jack; black cavalli; jack crevale or yellow cavalli; is a common species of large marine fish classified within the jack family; Carangidae. The crevalle jack 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 is distinguishable from similar species by its deep body; fin colouration and a host of more detailed anatomical features; including fin ray and lateral line scale counts. It is one of the largest fish in the genus Caranx; growing to a maximum known length of 124 cm and a weight of 32 kg; although is rare at lengths greater than 60 cm. The crevalle jack inhabits both inshore and offshore waters to depths of around 350 m; predominantly over reefs; bays; lagoons and occasionally estuaries. Young fish dispersed north by currents in the eastern Atlantic are known to migrate back to more tropical waters before the onset of winter; however; if the fish fail to migrate; mass mortalities occur as the temperature falls below the species' tolerance limits.; 1700-1880