Scientific Name
Allothunnus fallai
Common Name
Slender tuna
Biology
Dorsal
spines
(total): 15 - 18;
Dorsal
soft rays
(total): 12-13;
Anal
spines: 0;
Anal
soft rays: 13 - 14;
Vertebrae: 40. Interpelvic process small and bifid. Body naked ventrally behind the long anterior corselet. Dorsal half of body to lateral line covered with scales. Swim bladder absent. The back is bluish, turning to deep purple or almost black on the head; the belly is white, without stripes or spots; the pectoral and pelvic fins purple, their inner sides black.