1. From the appearance of the nail back. The wild turtle shell has a smooth back, thin and even skin, and a waxy light sense, which can be seen in the carapace corridor. However, the back skin of cultured turtle shell is slightly thicker, and the wart grains are rough and dull, which is not easy to see the shell corridor like toad skin.
2. press the abdominal nail. The elastic strength of the abdominal cartilage of wild soft-shelled turtle is large, and the resilience of pressing with fingers is large. The abdominal cartilage of cultured soft-shelled turtle is weak in elasticity, and it feels soft and weak when pressed with fingers.
Generally, the back of wild soft-shelled turtle has black spots (the whole back of soft-shelled turtle in greenhouse is black), and the wrinkles on the skirt at the back and tail are thin and clear, while the color of the back of wild soft-shelled turtle in the river is slightly yellow, while the color in the lake is black because the water does not flow very much and there is more silt. Turtle is rich in fat, amino acids, vitamins and minerals needed by human body. Its meat is tender and delicious, and it is favored by consumers. Especially the wild soft-shelled turtle has very high nutritional value and excellent quality.