Sea cucumber is a kind of creature that we are familiar with, and it is easy to see them in our daily life.To classify sea cucumbers according to their category, sea cucumbers belong to the phylum Echinodermata, so they are a kind of echinoderm.The history of sea cucumber is very long.Their appearance characteristics are very significant, their bodies are cylindrical, the whole body has tentacles, but the specific shape of tentacles is different, different varieties of sea cucumbers will have more obvious differences.
Furthermore, we can start with the living environment of sea cucumbers to divide them.Sea cucumber is living in the ocean, can be said to be a kind of marine animals.Sea cucumber is widely distributed in the sea area of our country, sea cucumber can also be cultured artificially, people generally choose to breed them in coastal areas.In fact, sea cucumber is not only distributed in China, but also widely distributed in the world.Especially in the western part of the Pacific Ocean, not only the number of sea cucumbers is large, but also the species is very rich.The country with the largest number of sea cucumber species is India.
As mentioned above, sea cucumber belongs to echinoderm in terms of category, so it belongs to animal rather than plant in terms of category.As an animal, sea cucumber is quite different from plants.One of the biggest differences is whether autotrophic, generally speaking, plants can be autotrophic organisms, can carry out photosynthesis.Sea cucumbers can't, they can only use some plants or plankton in the water.
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