Tuna ocean sea underwater fish fishes 11. 50 cm 16 ft weight. A tuna also called tunny is a saltwater fish that belongs to the tribe thunnini a subgrouping of the scombridae mackerel family. Coastal fish also called inshore fish or neritic fish inhabit the sea between the shoreline and the edge of the continental shelfsince the continental shelf is usually less than 200 metres deep it follows that pelagic coastal fish are generally epipelagic fish inhabiting the sunlit epipelagic zone. 684 kg 1508 lb.
The thunnini comprise 15 species across five genera the sizes of which vary greatly ranging from the bullet tuna max.