Wild sea cucumber, the thorns on the back are mostly four or five, the root of the thorns is thick and sturdy, the thorns are long and thin and pointed, and there are many small burrs between the thorns and the thorns.

2. Look at the sucker of the sea cucumber.

The sucker in the abdomen of wild sea cucumber is large, short, thick and powerful; the sucker of captive sea cucumber is small, long and thin.

3. Look at the size of the sea cucumber.

Because wild sea cucumbers grow in the deep sea without fixed bait, it takes three to five years for them to grow, so they are mostly dark gray with thick flesh and thin skin.

Because wild sea cucumbers grow in the deep sea without fixed bait, it takes three to five years to grow.