| Noun | 1. | genus Katsuwonus - oceanic bonitos; in some classifications placed in its own family Katsuwonidaefish genus - any of various genus of fish family Scombridae, Scombridae - marine food fishes: mackerels; chub mackerels; tuna Katsuwonus pelamis, oceanic bonito, bonito - fish whose flesh is dried and flaked for Japanese cookery; may be same species as skipjack tuna |