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CnidariaCnidaria is a phylum containing some 11,000 species of relatively simple animals found exclusively in aquatic, mostly marine, environments. Cnidarians get their name from cnidocytes, which are specialized cells that carry stinging organelles. The corals, which are important reef-builders, belong here, as do the familiar sea anemones, jellyfish, sea pens, sea pansies and sea wasps. The names Coelenterata and Coelentera were formerly applied to the group, but as those names included the Ctenophores (comb jellies), they have been abandoned. Cnidarians are highly evident in the fossil records, having first appeared in the Precambrian era.
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What kind of environment the cnidarians are living?

Cnidarians live in water.


What is the armlike structure that surrounds a cnidarians mouth called?

what is the arm like structures surrounding the mouth of cnidarians


What kind of circulatory system do cnidarians have?

None


What structure are the stinging cells of cnidarians located?

The stinging cells of cnidarians, called cnidocytes, are located on specialized structures called nematocysts. These nematocysts are found on the tentacles of cnidarians and are used for defense and capturing prey.


Do cnidarians have spicules?

No, cnidarians do not have spicules. Spicules are small, needle-like structures made of calcium carbonate or silica that are found in some sponges and echinoderms for support and defense. Cnidarians, such as jellyfish and corals, have a different type of support structure called a mesoglea.


How do ctenophores differ from cnidarians?

Ctenophores are gelatinous creatures with rows of cilia for movement and lack stinging cells, while cnidarians have stinging cells called cnidocytes. Ctenophores also have a simpler body structure compared to the more complex body plans of cnidarians, which include jellyfish, corals, and sea anemones.


What are two types of cnidarians that are formed by colonies?

small cnidarians and big cnidarians


What is the family for cnidarians?

The cnidarians are in the Kindom family


Do cnidarians have nerves?

cnidarians have no nervous system


Is a cnidarians invertebrates?

Yes, cnidarians are invertebrates.


What kind of syemmtrey is cniderians?

Cnidarians exhibit radial symmetry, which means their body parts radiate out from a central point. This symmetry allows cnidarians to capture prey efficiently from all directions.


What are the few organs that Cnidarians have?

Cnidarians have a simple body plan with a sac-like structure composed of three layers of cells: the epidermis, the gastrodermis, and the mesoglea. They possess specialized cells called cnidocytes that contain stinging structures called nematocysts, used for defense and capturing prey. Cnidarians also have a simple nerve net for coordinating movements and responses.