1. Marlin is a common name for large marine fish of Perciformes. ?

2. Undergraduate fish are widely distributed in the overhanging side of undergraduate fish, strong and powerful, with the head height tapering backwards and the tail handle powerful.

3, the body is small and scaly, and the skin is as thick as leather.

4. The maxilla protrudes forward, like a spear point, and its side edge is blunt and round.

5.2 dorsal fin. The first dorsal fin is straight out from the back head, and the tail is like a sail, clinging to the small second dorsal fin.

6. There are 2 gluteal fins, the caudal fin is large and deeply forked, the pectoral fin is sickle-shaped, and there are 2 protruding ridges on both sides of the caudal fin handle.

As shown in the figure: