bluefin tuna       
noun [ C or U ] uk/ˌbluː.fɪn ˈtʃuː.nə/ us/ˌbluː.fɪn ˈtuː.nə/  bluefin tuna or bluefin tunas
 蓝鳍金枪鱼
a large type of tuna (= a fish that lives in warm seas), or the flesh of this fish eaten as food
  They caught a 200-pound bluefin tuna. 他们钓到了一条 200 磅重的蓝鳍金枪鱼。 
 Bluefin tuna is prized by sushi lovers but stocks are declining rapidly. 蓝鳍金枪鱼深受寿司爱好者的喜爱,但其贮量正在迅速下降。 
 See also: yellowfin tunaskipjack tuna
 - More examples
 - Stocks of bluefin tuna are on the brink of collapse from overfishing.
 - Someone might pay hundreds of dollars for a large piece from a bluefin tuna.
 - That day we caught three bluefin tuna.
 - Scientists have found that the two populations of bluefin tuna migrate freely back and forth across the Atlantic.
 - The bluefin tuna is more endangered by fishing than whales, he said.
 - Bluefin tunas, unlike most fish, are homeothermic (warm blooded).