1. Distribution: Leptospira is mainly distributed in northeast and north China, while Gracilaria is distributed in southeast Sichuan and Tibet.

2. Body shape and appearance characteristics: Leptospira is relatively small, with a body length of 30-40 cm. Its appearance is characterized by a slightly flat side, a blunt head, a wide back and a slightly convex center. Graceful fish are relatively large, with a body length of 50 cm or even more than 1 m. From the appearance, this elegant fish looks like carp, and its scales are as thin as trout. The taste and meat quality are special, and you won't get tired of eating for a long time.

3. Eating habits: Leptospira mainly feeds on plankton, but also eats some aquatic insects and mollusks. Yawei is a special kind of stone on moss and stone, which can be eaten in water. Its staple food is natural stone pulp.

4. Folklore and cultural background: Lepidoptera has no special legend and cultural background. There is an old legend about this elegant fish. It is said that there is a sword falling from the goddess of mending heaven on its head, so this sword has become an important symbol to distinguish the authenticity of the elegant fish.

To sum up, there are significant differences between Leptospira and Serpentis in geographical distribution, physical appearance, eating habits and cultural background.