1, red pomfret, also known as freshwater white pomfret, although in appearance similar to pomfret, but its adult body has a black dorsal fin and shining orange-red metallic ventral fin.

2, is a saw fat carp subfamily, giant fat carp genus of a kind, and commonly known as "piranha" has a closer relationship. The fins have no hard spines. The dorsal fin is 18～19; the anal fin is 16～18; the ventral fin is 8. There are two swim bladder chambers, and the posterior chamber is longer than the anterior chamber. Lateral line scales 82-98. upper and lower jaw teeth are in two rows, with notched tips protruding from the surface, sharp teeth, capable of biting other organisms in the water, and eating their own kind when starvation food is not sufficient. The number of gill rakers in the first gill arch is 30-36. there is a distinct stomach, the gastric sac is U-shaped and enlarged, the length of the stomach is about 1/5 of the length of the intestine, there is a pyloric blind sac (pyloric pituitary) at the junction of the stomach and the duodenum, and there are fat masses around the intestine and viscera.