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[Is jellyfish a jellyfish] The relationship between jellyfish and jellyfish

2021-05-12 / 733 Read

There are many kinds of animals and plants on the earth, many things we can't call their specific names, and some animals are very similar to another animal but they are different categories, so many animal categories netizens also If you can't tell the difference clearly, it is like comparing jellyfish and jellyfish. These two aquatic animals believe that many friends do not know how to distinguish them, or even know whether they are the same aquatic animal.

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Is a jellyfish a jellyfish?

A jellyfish is a very beautiful aquatic animal. Although it has no spine, its body is very large, and its huge body is mainly supported by the buoyancy of water. Although it is a lower coelenterate, it appeared earlier than dinosaurs, dating back to 650 million years ago. Taxonomically, jellyfish belong to the phylum Coelenterates and the class of jellyfish. There are many kinds of it, there are about 250 kinds in the world, its size and diameter can range from 10 cm to 100 cm, and people tend to classify them according to their different umbrellas: some umbrellas emit silver light, called Silver jellyfish; some umbrella-shaped bodies are like monks' hats, which are called monk jellyfish; some umbrella-shaped bodies are like white sails on ships, called sail jellyfish; some are like umbrellas, called umbrella jellyfish; Shining with the light of colorful clouds, they are called Xia jellyfish... Most of them live only a few weeks, and some live for about a year, and some deep-sea jellyfish can live longer.

A jellyfish is not a jellyfish

It can only be said that a jellyfish is a type of jellyfish, but a jellyfish is not a jellyfish. Jellyfish belong to the phylum Coelenterates, the class of jellyfish, the order Rhodostomata, the family Rhodostomata, and the genus Jellyfish. So jellyfish is a kind of jellyfish. The jellyfish is a marine coelenterate. The body of the jellyfish is umbrella-shaped, translucent, white, cyan or slightly yellow. The diameter of the jellyfish umbrella can exceed 45 cm, and the maximum can reach 1 meter. The 8 thickened under the umbrella The base of the (shouldered) wrist heals so that the mouth disappears (replaced by the secondary mouth of the sucker), and there are many rod-like and filamentous tentacles at the lower mouth and wrist, with dense nematocysts, which can secrete venom. Its function is to release venom to paralyze when it touches small animals to make food. Jellyfish are widely distributed in tropical, subtropical and temperate coastal areas. The common jellyfish in my country include edible jellyfish with smooth umbrella surface and only filaments at the wrist or rod-shaped jellyfish with rod-shaped objects, and jellyfish with many small wart protrusions on the umbrella surface. Macular jellyfish.