What's the difference between sunray and tortoise?

The difference between these two aquatic animals lies in their living habits, appearance characteristics and nutritional value.

1. Living habits: Shanrui and soft-shelled turtle are both aquatic animals, but Shanrui has strong adaptability to the environment, and can maintain 1 week after a full meal. Turtles have no such characteristics.

2. Appearance characteristics: there are sarcomas on the dorsal shell and ventral shell of Shanrui, but there are no sarcomas on the dorsal shell and ventral shell of turtle. Shanrui's head is longer and tubular than turtle's, while turtle's head is shorter.

3. Nutritional value: Shanrui and soft-shelled turtle are rich in protein, amino acids, unsaturated fatty acids and other nutrients beneficial to human body.