By swimming using tentacles

Cnidarians are a phyla in the kingdom Animalia, and more specifically, the subkingdom Eumetazoa.

Cnidarians are divided in 3 main groups: the antozoan, syphozoans and cubozoan. The anthozoans are sea anemones and coral and cubazona are jellyfish. Most do not move around, but if necessary they move to get away from predators; the ocean current carries them. But, cubazonas, such as jellyfish, propel themselves to move by opening and closing their bell slowly.

No, hydra hasn't been proven real and is labeled a myth

This is a trick question. Because hydras are only two cell layers thick, they do not have a true circulatory system. The inner cell layer absorbs materials directly from their gastrovascular cavity. So a hydra doesn't have blood!

Yes this is a proof: when corals grow another coral is probably growing in the way the other one is there they fight they digest each other and they also live because fire corals can hurt or sting

It is a false belief that corals spend their adult lives as medusas. Corals spend their adult lives as polyps.

While some saltwater fish, most notably damselfish, can be slowly converted to fresh water, coral are more sensitive, and no known species can live in even brackish water.

Check out Pine lake Alberta southeast of Red Deer. It has freshwater "coral", but they are actually stramatolites. It looks like Brain Coral. This is a popular SCUBA diving spot in the region.

There are also species of freshwater jellyfish, which is close to coral on the family tree. Freshwater jellyfish usually live in the coastal areas, in rivers and lakes.

The Hydra was a fearful monster in Greek mythology with many heads. Whenever you cut one off, two more appeared in its place. Destroying the Hydra was one of the twelve labours that Hercules/Heracles was required to perform. To kill the monster, the heads were cut off, then the stumps were burned so that they could not grow back.

it depends on what style you are going to make.

assumed you would like to make a carol for a shorts or skirt (bottom). i suggest to use white color or light apple green. for tops, such as tee causal wear looks better.

There are different stories on this; he either strangled it, or shot it with a specially created arrow.

A person who hunts animals for their fur is called a fur trapper.

They belong to the Phylum Cnidaria

No. Cnidarians don't even have a circulatory system.

Yes Hydra are unicellular alga chlorella within the cells of the gastrodermis.

No. Cniderians are soft bodied, simple creatures like jellyfish, anemones and corals. Crabs are arthropods.

Cnidarians are the group of invertebrate animals which possess stinging cells called cnidocytes. The popularly-known cnidarians fall into only a couple of major groups. The Anthozoans or corals, sea pens, and anemones are sessile--that is stationary in lifestyle. The Scyphozoa or jellyfish are motile (mobile in lifestyle). So, the answer to the question is that anemones, coral, and jellyfish are all cnidarians.

When food is plentiful, many hydras reproduce asexually by producing buds in the body wall which grow to be miniature adults and simply break away when they are mature. When conditions are harsh, often before winter or in poor feeding conditions, sexual reproduction occurs in some hydras. Swellings in the body wall develop into either a simple ovary or testes. The testes release free swimming gametes into the water and these can fertilize the egg in the ovary of another individual. The fertilized eggs secrete a tough outer coating and, as the adult dies, these resting eggs fall to the bottom of the lake or pond to await better conditions, whereupon they hatch into miniature adults. Hydras are hermaphrodites and may produce both testes and an ovary at the same time.

Many members of the Hydrozoa go through a body change from a polyp to an adult form called a Medusa. However, all hydras remain as a polyp throughout their lives.

All cnidarians have on their tentacles stinging cells called nematocytes. They have no brains or a central nervous system. Another common feature is that they all can regenerate, letting them produce asexually (without the need for another partner) and to recover from injury.

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Since Hydra is part of the group of cnidarians, it is a bit more complicated than a sponge. The way that hydra digest their food is through extracellular digestion. This means that hydra actually have a special gut cavity that traps and digests food instead of having a bunch of cells do it, like a sponge. This gut cavity only has one opening and during digestion, enzymes from the cell wall are released to aid in breaking down the food. Once digested, the food is engulfed by cells from the wall into tiny particles through a process called Phagocytosis.

the indigestible material of its prey is excreted out of its mouth

Cnidarians have a radial symmetry.