Tuna - fish feed machine
A tuna is a saltwater fish that belongs to the tribe Thunnini, a subgrouping of the Scoridae (mackerel) family. The Thunnini comprise 15 species across five genera, the sizes of which vary greatly, ranging from the bullet tuna (max. length50 cm (1.6 ft), weight1.8 kg (4 lb)) up to the Atlantic bluefin tuna (max. length4.6 m (15 ft), weight684 kg (1,508 lb)).