- Large median keel with 2 smaller keels on either side of caudal peduncle
- 8–13 gill rakers on first gill arch
- 7–9 dorsal finlets and 6–7 anal finlets
- Teeth small and conical
- Tongue without ridges or teeth
- Body entirely covered in minute scales behind a corselet of well-developed scales
Steel-blue above with 5–11 narrow dark stripes on upper sides, silvery below, first dorsal fin dark.
Up to 102 cm TL and up to at least 10.7 kg in weight.1
Found in subtropical waters of the Indo-Pacific.
Inshore pelagic. Found within a temperature range of 13.5–23°C and found at depths from the surface to 30 m.
Feeds on smaller fish, particularly clupeoids and also small crustaceans and squids. Schools with similarly sized tuna. Length at 50% maturity was estimated between at between 42 – 54 cm FL.2 Relative fecundity varies from 293,793 to 696,512 for fishes between 39 and 52 cm FL. Maximum age is at least 4 years.3
Caught mainly by pole-and-line, also by purse seines and drift nets.
Bullet & Frigate tuna