1. Different back spines: The spines on the back and both sides of the rice sea cucumber are equally strong; while the spines on the back and both sides of the sea cucumber are different in thickness and length due to the influence of the growth environment, and the spines are slender. Seems powerless.

2. The spit is different: the spit of sea cucumber is large and hard; while the spit of sea cucumber is soft and not firm due to its fast growth.

3. Different shapes: rice sea cucumber is spindle-shaped, with two tips and a thick middle, short and fat, and looks very strong; while sea cucumber is long and slender and lacks toughness.

4. Different soles: sea cucumbers usually grow in sea areas with a water depth of about 20 meters. They use their soles to find food, so their soles are short and strong; sea cucumbers, on the other hand, are eaten by farmers for a long time. The bait 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.