The Tuna are several species of ocean-dwelling fish in the family Scombridae. Tunas are fast swimmers. They are warm-blooded, which enables them to live in colder waters, which enable tuna species to survive a wider range circumstances.

It is very hard to keep them in a captive environment. Monterey Bay Aquarium is one of the few aquariums in the world that successfully keep tuna in display.

Types include:

• bluefin tuna, which can grow to 1,500 pounds.
• yellow fin tuna

Tuna is a popular seafood, and in danger from overfishing.

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Musician's saying: "You can tune a piano, but you can't tuna fish."

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In Polynesian mythology, Tuna is the god of eels who was sentenced to be executed (by the Upolo) after trying to rape Sina (who had grown him in a jar). He asked that his head be buried in the sand and from it, the first coconut grew. He was Hina's lover.