The bullet tuna (Auxis rochei) is a species of tuna, in the family Scombridae, found circumglobally in tropical oceans, including the Mediterranean Sea,[2] in open surface waters to depths of 50 m (164 ft).

The population of bullet tuna in the Eastern Pacific was classified as a subspecies of A. rochei, A. rochei eudorax, but some authorities regard this as a valid species Auxis eudorax.

Sometimes called bullet mackerel, the bullet tuna is a comparatively small and slender tuna.

Bullet tunas are blue-black on the back with a pattern of zig-zag dark markings on the upper hind body, and silver below.

They feed on small fish, squid, planktonic crustaceans, and stomatopod larvae.