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1. Important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks
   - tuna, tuna fish
    
2. Any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters
   - tuna

Sounds like:

Derived forms: tunnies

Type of: food fish, saltwater fish, scombroid, scombroid fish

Part of: genus Thunnus, Thunnus

Encyclopedia: Tunny