A relative of tuna, the Atlantic bonito has a reputation as a tough ﬁghter and a tasty ﬁsh, making it highly popular with anglers.
IdentificationThe Atlantic bonito has a completely scaled body (some types of bonito have only partially scaled bodies), a noticeably curved lateral line, and six to eight ﬁnlets on the back and the belly between the anal ﬁn and the tail. The caudal peduncle has a lateral keel on either side, with two smaller keels above and below the main keel. It doesn’t have a swim bladder or teeth on its tongue.
The back is blue or blue-green, fading to silvery on the lower sides and the belly; a characteristic feature of the Atlantic bonito is the dark lines that extend from the back to just below the lateral line. It can be distinguished from the tuna by its slimmer body, a mouth full of teeth, and dark lines on its back, rather than on its belly.