Confusingly similar in looks to the Yellowfin TunaÐeven down to the yellow inlets edged in black. The gold stripe common to the Yellowfin is usually absent, but may be dimly present. The eye is indeed larger, but this might not be readily apparent without a side-by-side comparison. A scientist might have to examine the liver to be perfectly sure of identification with some specimens, but anglers seldom have to worry, simply because the Bigeye is a rare catch, whereas the Yellowfin is common in many areas. Dorsal spines (total): 13 - 14; Dorsal soft rays (total): 14-15; Anal spines: 0; Anal soft rays: 14; Vertebrae: 39. A large species, deepest near the middle of the first dorsal fin base. Lower sides and belly whitish; a lateral iridescent blue band runs along the sides in live specimens. The first dorsal fin is deep yellow, the second dorsal and anal fins are light yellow, the finlets are bright yellow edged with black.