1. Bottom feet: Wild sea cucumbers generally grow in sea areas with a water depth of about 20 meters. They use their bottom feet to find food, so their bottom feet grow short and strong; while captive sea cucumbers have been cultivated for a long time. The bait put by personnel does not need to be moved, and it lives in shallow water areas. The action of the bottom feet is reduced, the adsorption force is poor, and they become slender.

2. Sand spit: The sand spit of wild sea cucumbers is large and hard.

3. Meat quality: Because wild sea cucumbers grow in deep waters (15 to 20 meters), low water temperature, little sunshine, slow growth, thick and elastic meat, thick and full tendons, and rich deposits of nutrients; while in captivity Sea cucumbers grow quickly and their flesh is soft and not firm.

4. Shape: Wild sea cucumbers are spindle-shaped, pointed at both ends, thick in the middle, short and fat, and look very strong; while captive sea cucumbers are slender and lack toughness.

5. Growth years: Wild sea cucumbers generally grow for more than 4 to 5 years before reaching fishing standards. The longer the time, the more nutrients are deposited and the greater the nutritional value; while the temperature of captive sea cucumbers is suitable for rich food and growth speed. Fast, generally 5-8 heads can be sold after reaching product specifications, and the health and nourishing effect is relatively poor.

6. Appearance: Generally, good sea cucumbers have clear cortex and natural color. According to the different colors of the growing environment, they are mainly divided into black, brown, gray, etc., that is, they are by no means completely black, and certainly not completely black. It is a white powder, and the spines and tube feet on the abdomen are generally relatively complete. Secondly, it depends on the foaming effect of the sea cucumber. The meat of good sea cucumbers is stronger and elastic when eaten.