Are sea anemones coelenterates or mollusks

Sea anemones are coelenterates, not mollusks.

Sea anemones belong to the coelenterate (now called "cnidarians"), belong to the animal kingdom, cnidarians (coelenterates) phylum, corals, hexacorals, anemones, and are a class of carnivores that grow in water, and there are many species.

Sea anemones are very simple animals with only two germ layers. They don't have an exoskeleton and live in the ocean. The body is cylindrical, the lower end (base) is slightly enlarged, called the basal disk, can secrete mucus, can be fixed on shallow water rocks, stakes or shells, crab claws, some species once fixed will not move, and some species can slide slightly on it.

The upper end of the body is an oblate mouth plate, ** has a long slit mouth, generally on both sides of the mouth there is a narrow depression, called the mouth groove, the cells on the mouth groove wall have cilia, when the cilia swing, it can cause a fresh flow of water containing tiny organisms along the mouth groove into the digestive cavity, not only to obtain food, but also to carry out gas exchange, water flow containing metabolic wastes, and then through the mouth and the mouth ** part of the outflow.

To put it simply, the anemone's body is like a leather pouch with a fixed lower end and an open upper end, with an unequal number of tentacles around the mouth, which is used to pluck the seawater and help to eat plankton and small fish and shrimp in the seawater, and then digest them in the body cavity (pocket). But its mouth is also a breathing and excreting mouth.

It has many stinging cells on its tentacles, and after coming into contact with its prey, it can release the venom from the stinging cells into the prey to paralyze the prey.

The degree of evolution of mollusks is much higher than that of cnidarians, with highly differentiated body tissues and complete various organs and systems, such as digestive system, circulatory system, respiratory organs, excretory organs, nervous system, reproductive system, etc. Molluscans are generally all kinds of shellfish, single-shells such as various snails and snails, and bivalves are used to all kinds of shellfish.

They are very different from cnidarians.

Anemones are coelenterates, animals or mollusks, and anemones are mollusks.

Sea anemones are coelenterates.

Sea anemones belong to the phylum Cnidarians, and the original name of the phylum Cnidarians was coelenterates, so anemones also belong to a kind of coelenterate. Sea anemones conform to many characteristics of coelenterates. Most coelenterates have radially symmetrical bodies with fixed shapes, as do sea anemones.

Coelenterates generally have stinging cells on the outside of their bodies, and many of them are distributed on the tentacles of sea anemones.

Morphological features of sea anemones

Anemones look a lot like plants, but they are actually animals. The individuals in the warm sea are large and cylindrical in shape. In the crevices of the rocky banks where water is stored, the common papillae with papillae on the body surface is the green side flower anemone.

In the East China Sea, the number of anemones in the Pacific Ocean can reach hundreds to nearly 10,000 per square meter.

On a few square centimeters of shells and stones, there will also be purple-brown longitudinal striped anemones with orange longitudinal bands, which resemble watermelons when they shrink, so they are also called watermelon anemones. In addition, there are thin-fingered anemones with many tentacles. The monomer of the anemone is cylindrical, and the open end of the cylinder is the mouth disc and the closed end is the base disk.

The mouth plate ** is the mouth, and the mouth is surrounded by soft and beautiful petal-like tentacles with full stretch, like a vibrant sunflower, hence the name. The number of tentacles varies from species to species, but the inner ring is larger than the outer ring, and the number is a multiple of 6, which has the functions of feeding, defending and locomotion. The base plate at the attached end can secrete glands that can be attached to hard objects such as stones, shells, seaweed, or wooden stakes.

Be.

According to the inquiry of Qingxia Education Network, the following are coelenterates: ()a sea anemone, jellyfish and jellyfish; b Anemones, seahorses and hydras; c Jellyfish, hydrops and euglena; d Roundworms, corals and jellyfish. The answer is a, so anemones are coelenterates.

The sea anemone (scientific name: actiniaria) is a carnivore that grows in the water and is a genus of orange anticandia, and it is known that it is a very simple animal with no central information processing mechanism, which means that it does not have even the lowest brain foundation.