bluefin tuna

noun6

1. •
   Any member of genus Thunnus of tuna, having blue fins.
2. •
   Atlantic bluefin tuna (Thunnus thynnus), found in both the western and eastern Atlantic Ocean, and also
3. •
   in the Mediterranean Sea.
4. •
   longtail tuna (Thunnus tonggol), found in tropical Indo-West Pacific waters.
5. •
   Pacific bluefin tuna (Thunnus orientalis), found widely in the northern Pacific Ocean and locally in the south.
6. •
   southern bluefin tuna (Thunnus maccoyii) of waters of the southern hemisphere.