1, Pseudosciaena crocea, commonly known as American red snapper, red snapper, black snapper, spotted snapper, red drum, channel snapper, etc. It belongs to Perciformes, Sciaenidae and Fishes, and it is a kind of warm water, wide temperature, wide salt and anadromous fish. The body is rotating and its shape is similar to that of domestic large yellow croaker. The body color of adult fish is reddish above the abdomen, and there are 1 to 4 round black spots above the base of the tail stalk of young fish, and the edge of the tail fin is blue.

2, tropical fish red sword, like a spindle. Strong and easy to raise. It grows well in the water temperature of 20 degrees Celsius and is suitable for raising in the water temperature of 24 to 26 degrees Celsius. It likes to jump after being frightened, and its jumping ability is very strong.

3. Carassius auratus, spindle-shaped, 5 to 7 cm long, can reach 14 to 15 cm in the wild. The young fish is silvery white, with the growth, the back is silvery white, the back is yellow-green, there is a black round spot on the back and black spots on the dorsal fin.