The bonito belongs to the tuna family, which is a kind of low-value tuna with abundant resources.

        The body is fusiform, sturdy, with a body length of 60 cm. The body is brown-black, with irregular black bands above the lateral lines. The tail is short, the caudal stalk is thin and strong, with a central ridge and 2 small lateral ridges on each side. The side of the body is only rounded on the breastplate, and the rest are bare without scales. There are 2 dorsal fins far apart, 7-9 small fins behind the dorsal and anal fins. The pelvic fins have a large protrusion, one piece. Feeds on small fish and invertebrates.