1, lion fish. Gorgeous body color, mostly red, with dark horizontal bands. Spawning in summer, egg floatability, adhesion. They mainly feed on crustaceans. When encountering an enemy, he sprints sideways to the other side with dorsal fin spines. Fin spines have poisonous glands, which cause severe pain after being stabbed, and severe cases of dyspnea and even syncope;

2, the river. Cuckoo is a warm temperate zone and tropical offshore bottom fish, which inhabits the middle and lower layers of the ocean. A few species enter the freshwater rivers, and when encountering external dangers, the whole body floats to the surface in a spherical shape, and at the same time, the small thorns on the skin stand up to defend themselves. The common ones are fugu rubripes, fugu obscurus, black gill rabbit, concave nose, black spot fork nose, etc.

3, mud. The body is oblong, with flat sides, curved back and abdomen edges, and slender tail handle. Small head. Kiss the cusp, but do not form the snout tube. Big eyes, lateral position. Small mouth, front and bottom. The body is covered with small round scales, with scales in the front of cheek and no scales in the midline of throat. The hard spines of each fin, dorsal fin, ventral fin and gluteal fin are strong and all have poisonous glands, and the caudal fin is slightly concave. Yellow-green or yellow-brown, with white spots and small black spots. The general length is 20 cm and the maximum length is 30 cm.