Sea cucumbers are distributed in all sea areas of the world, with the most species in the Indo-Western Pacific, especially edible sea cucumbers, which are mostly distributed in tropical coral reefs. There is only one kind of edible sea cucumber in northern China, namely Stichopus japonicus, but there are more than a dozen edible sea cucumbers in Hainan Island and Xisha Islands. Most edible sea cucumbers live in intertidal zone or shallow sea. There are sea cucumbers in the deep sea and even in the abyss. Most of them are flat-footed sea cucumbers.

The most common animal in ten thousand meters deep ditch is sea cucumber. However, deep-sea sea cucumbers are inedible. Edible sea cucumbers mostly inhabit hard stone bottom, coral reef bottom or coral sand bottom. They can crawl slowly on the bottom of the sea, or lurk in the sand, or hide under stones. Sea cucumber has a "summer sleep" phenomenon, and sea cucumber with jade foot has a "hibernation" phenomenon.

Sea cucumber has a strong regenerative power. When stimulated or in a bad environment, such as dirty water and lack of oxygen, the body tends to contract strongly and oppress the internal organs to be discharged from the anus. This phenomenon is called excreting organs. After the internal organs are discharged, new internal organs can be regenerated. Several sea cucumbers are cut into 2-3 sections, and each section can regenerate a complete individual.

Extended data:

Main varieties of Stichopus japonicus:

1, Japanese ginseng

Plum-blossom ginseng, also known as "pineapple ginseng", is named after its many spikes on the body surface. The spines of the ginseng are connected at the base, shaped like plum blossoms, and its body color is pure black or purple. It is the best and largest sea cucumber produced in Nanhai, China.

2. Green sea cucumber

Green Stichopus japonicus, also known as square Stichopus japonicus, square Stichopus japonicus, sea hammer or sea rat, belongs to the family Holothuridae and is mainly produced in Beihai and Hainan Island of China. Its body is quadrangular, with a row of round-headed spines on each side, which is slightly reddish yellow in color and small in size.

3. Stichopus japonicus

Stichopus variegatus, also known as "Yellow Stichopus japonicus", "White Stichopus japonicus" and "Square Stichopus japonicus", are common edible sea cucumbers in the South China Sea. They are 20-40 cm long, with cylindrical bodies, different sizes of flesh spines (wart feet) arranged on their backs, flat bellies, dense tube feet, mouths in front, inclined to the ventral surface, and lintel tentacles. It belongs to Stichopus japonicus, with high yield and good quality, but it is too soft and tender.

Baidu Encyclopedia-Sea Cucumber (Echinoderm of Sea Cucumber Class)

Baidu encyclopedia-sea cucumber (seafood)