Get Phylum Of Bell Or Umbrella Shaped Bodies

Basic Characteristics of Cnidaria Classes of Cnidarians. The four recognized classes of Cnidaria are: Hydrozoa, Cubozoa, Scyphozoa and Anthozoa. ... Body Symmetry. The majority of Cnidarians share the characteristic of radial symmetry. ... Body Structure. ... Reproductive Cycle. ... Capturing Food.

Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are anchored to the seabed by stalks rather than being mobile. The bell can pulsate to provide propulsion for highly efficient locomotion.

There are four major groups of cnidarians: Anthozoa, which includes true corals, anemones, and sea pens; Cubozoa, the amazing box jellies with complex eyes and potent toxins; Hydrozoa, the most diverse group with siphonophores, hydroids, fire corals, and many medusae; and. Scyphozoa, the true jellyfish.

Cnidaria is derived from a Greek word “cnidos” meaning stinging thread. These entities are characterized by the presence of cnidae. Cnidaria is a phylum under Animalia Kingdom, a classification comprising 10,000 described species, some of them are corals, sea anemones, jellyfishes and hydras.

cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.

The phylum Cnidaria (pronounced “nih DARE ee uh”) includes soft-bodied stinging animals such as corals, sea anemones, and jellyfish (Fig. 3.23 A). The phylum's name is derived from the Greek root word cnid- meaning nettle, a stinging plant. Cnidarians are found in many aquatic environments.

Cnidarians contain specialized cells known as cnidocytes (“stinging cells”), which contain organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, serving to immobilize prey with toxins contained within the cells. Nematocysts contain coiled threads that may bear barbs.