Friends helped get a big piece of flag fish

Friends helped to get a large piece of swordfish. The fish are divided into two families: Swordfish and Swordfish. There are only 1 genus and 1 species of Swordfish Family, and 5 genera and 11 species of Swordfish Family (Fig. 1). Their Chinese names and common names are confused, while their English names are clear. In The Old Man and the Sea, the big "marlin" that fights the Santiago old man should be the Atlantic bluefin / Makaira nigricans / Atlantic blue marlin.