- Thunnus, genus Thunnus - tunas: warm-blooded fishes
--1 is a kind of fish genus
--1 is a member of Scombridae, family Scombridae
--1 has members:tuna, tunny; bluefin, bluefin tuna, horse mackerel, Thunnus thynnus; yellowfin, yellowfin tuna, Thunnus albacares