1. The body is slender and slightly flat, the head is small and sharp, and the head is longer than the body height. The mouth is big, and there are fluffy teeth on the upper, lower and tongue in the front position.

2. big eyes. The scale is large and the lateral line is not obvious.

3. The back is grass green and slightly yellow; Body side silvery white; There are black spots on the edge of scales; Each fin is gray-black.

The male fish is a small fish. Generally, the adult fish is only 8-9 cm, but the number is large, and there is a certain yield in the producing area. The male fish has a fragrant cucumber flavor, so the residents in the producing area call it cucumber fish.