How to identify a Bluefin Trevally
In adults, the back and flanks are a brilliant turquoise blue, silvery blue, or greenish blue, generously covered with small blue or black spots. The tail and other fins may be an even more striking blue than the body. The anal and dorsal fin lobes often are white-tipped and the tail is black edged. Young fish lack spots (including the operculum spot), and have a silvery-yellow body much like that of any other jack species. Even these juveniles are distinctive with their bright yellow pectoral fins and deep blue second dorsal and anal fins.Adult bluefin trevally are deep-bodied and have strong scutes. The dorsal fin is moderately low, with 8 spines plus one very small spine ahead of the fin. The second dorsal and anal fins are long with prominent anterior lobes. The tail is deeply forked and the pectoral fins are long and falcate. The sloping forehead of this species is distinctive giving this fish a profile that is readily recognizable to those who are familiar with them. Males are slightly larger than females and sexual maturity occurs at a fork length of about 15 inches.
Where to catch Bluefin Trevally
The bluefin trevally is widely distributed in the tropical and subtropical waters of the Indian and Pacific Oceans. It can be found on the Pacific coast of North America from Southern California, USA and Cabo San Lucas on the southern tip of Baja California, Mexico, south to Panama. It is common throughout Hawaii and Polynesia, occurring in harbors, channels, and on outer reefs. The following list includes additional details on where to catch this fish: