Primarily pelagic, but may enter atoll lagoons or swim above reef slopes, also found in coastal areas. Highly migratory. Forms schools and often associated with groups of pelagic fishes. Feeds on plankton, pelagic crustaceans, baitfish, squid, and tuna. Possibly to 2100 cm. (Ref. 5578). Temp. range: 21-25°C; salinity 34-34.5 ppt. Can bump boats but are more often assaulted by humans as they bask in the surface. World's largest fish. Edible and utilized dried-salted (Ref. 9987).