abstract:The blue trevally, Carangoides ferdau (also known as the banded trevally, barred trevally, Ferdau’s trevally and Forskaal’s jackfish) is a common widespread species of pelagic marine fish classified in the jack family, Carangidae. The blue trevally is distributed throughout the tropical and subtropical waters of the Indo-Pacific and central Pacific regions, ranging from South Africa in the west to Hawaii in the east.