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Fish

Fish are the oldest vertebrates, with about 32,100 named species distributed in various waters on Earth, of which China has about 2,500 species, most of which live in seawater, with more than 1,500 marine fish and about 800 freshwater fish. In the past, fish were usually divided into two categories, cartilaginous fish and bony fish, based on the similarities and differences in the properties of their bones.

Sphyrna lewini

Sphyrna lewini

Scalloped hammerhead shark, red hammerhead shark, scalloped shark, hammerhead shark, double-breasted shark

The eyes and nostrils of the scalloped hammerhead shark are located on the l···

Pleuronectiformes

Pleuronectiformes

Pleuronectiformes,heterosomata,flounder

Flounder is a general term for fishes of the order Plaice. It has no swim bl···