The sea cucumbers in China include all animals called "sea cucumbers" or dry sea cucumber. In a narrow sense, it only refers to the genus Holothuria. The genus Holothuria is the largest genus of Holothurian, including 120 species. This product belongs to echinoderms, sea cucumbers and sea cucumbers. Morphological characteristics:
The body is cylindrical, with a length of 10 ~ 20 cm and an extra large size of up to 30 cm. Tentacle wheel, 17 ~ 30, generally 20. The tentacles are well developed. The mouth is at the front end, mostly on the abdomen. The anus is at the back end, mostly at the back. There are generally wart feet on the back and tube feet on the abdomen.
There are many kinds of sea cucumbers, about 500 in the world and more than 60 in the coastal areas of China.
Sea cucumber is cylindrical, generally 30 ~ 40 cm long, with a mouth at the front end, 20 tentacles beside the mouth and an anus at the back end. Some sea cucumbers have scattered spines on their backs and many tube feet on their ventral surfaces. They often live under the fine sand seabed or coral reefs with stable water flow and abundant algae, and feed on small shellfish or algae in seabed sediments. Although the digestive tract of sea cucumber is very long, about twice as long, the wall is very thin, and there is no organ with chewing function in the oral digestive tract, so it helps digestion by swallowing a lot of sand or broken shells.
Sea cucumber relies on the coordinated expansion and contraction of muscles in the body to achieve movement, or alternatively crawls forward with the help of tube feet. How can slow-moving sea cucumbers resist the enemy? It turns out that the sea cucumber has a special organ containing toxins-Ju Weiye's tube. When attacked by an "enemy", it can discharge Ju Weiye's canal from the anus, entangle and poison the invading "enemy".
In addition, sea cucumber has a special method to defend against the enemy, that is, with the help of strong muscle contraction, the internal organs are discharged from the anus to confuse each other and take the opportunity to avoid. Interestingly, the other person often only swallows the internal organs of the sea cucumber, but does not eat its body wall. Why is this? It turns out that the body wall of most sea cucumbers contains sea cucumber toxin, which will have a toxic reaction to the devourer and cause symptoms such as muscle paralysis and hemolysis.
Sea cucumber has a strong regenerative ability and will not endanger life after excretion. After 1 ~ 2 days, a new set of internal organs was formed in the body.