What does "bluefin" mean?

bluefin tuna, any of a number of types of tuna characterised by their blue fins.

Bluefin

Common synonyms include: bluefin tuna, thunnus thynnus, blue-finned, blue-tinted, bluish, horse mackerel.

noun

noun ·Rare ·Advanced level

Noun

1
bluefin tuna, any of a number of types of tuna characterised by their blue fins.
2
largest tuna; to 1500 pounds; of mostly temperate seas: feed in polar regions but breed in tropics wordnet
3
flesh of very large tuna wordnet

"Bluefin tuna can live up to 40 years."

From blue + fin.