bluefin tuna

Short definition from Wiktionary

Noun

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