Tuna is often referred to as tuna fish. There are several varieties of tuna such as: albacore, blue fin, black fin, bonito, skipjack, aku, kawakawa, yellow fin, big eye, or ahi. These ocean dwelling fish belong to the scombridae family. The flesh of tuna is pink to dark red., because the tuna contains so much myoglobin and oxygen. Tuna is a very important commercial fish. The big eye and the blue fin are often threatened by over fishing.
Tuna may be found in local grocery stores either fresh in the seafood section, or canned in the same isle you would find canned salmon. Tuna comes packed in water or oil and may be found chunk style or flaked.