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Cnidarians
Cnidarians
they belong to cnidarians
Jellyfish, hydras, sea pens, corals, hydrozoans, cubozoans, anthrozoans, anemomes, and possibly some parasites.
Cnidarians include jellyfish, anemones, hydras, and corals. They have a stomach and a tentacled mouth and are radially symmetrical.
Jellyfish, hydras, sea animones, corals and other invertebrate animals with tentacles and hollow body. ---Co0leTs24
This is straight from www.thefreedictionary.com, so I get no credit at all:"Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity, and including the jellyfishes, hydras, sea anemones, and corals. Also called coelenterate."
there is only 8, Echinodermata - sea stars, sea urchins, sea cucumbers Arthropoda - insects, arachnids, crustaceans Nematoda - round worms Mollusca - squid, snails, bivalves Annelida - segmented worms (earthworms, leeches, polychaetes) Platyhelminthes - flat worms Rotifera Acoelomorpha Ctenophora -- Comb jellies Cnidaria - jellyfishes, corals, sea anemones, hydras Porifera - sponges
cnidarians move from place to place. sponges dont.
Members of Class Hydrozoa include organisms such as Portuguese man o' war, fire corals, and hydras. These are predominantly marine animals characterized by their unique life cycle with alternating medusa and polyp stages.
The hydras are gone.
Invertebrates are animals without a backbone. The group represents 95% of all animal species. The phyla in the group include : * Arthropoda - insects, arachnids, crustaceans * Nematoda - round worms * Mollusca - squid, snails, bivalves * Annelida - segmented worms (earthworms, leeches, polychaetes) * Nemertea - ribbon worms * Platyhelminthes - flat worms * Rotifera * Acoelomorpha * Ctenophora - Comb jellies * Cnidaria - jellyfishes, corals, sea anemones, hydras * Porifera - sponges * Echinoderms - starfishes, sea urchin