As on land, invertebrates make up a huge portion of all life in the sea. Invertebrate sea life includes Cnidaria such as jellyfish and sea anemones; Ctenophora; sea worms including the phyla Platyhelminthes, Nemertea, Annelida, Sipuncula, Echiura, Chaetognatha, and the Phoronida; Mollusca including shellfish, squid, octopus; Crustacea; Porifera; Bryozoa; Echinodermata including starfish; and Urochordata - sea squirts or tunicates.The term "marine invertebrates" is used to describe animals found in a marine environment which are invertebrates: lacking a notochord. In order to protect themselves, they may have evolved a shell or a hard exoskeleton, but this is not always the case.
As on land and in the air, invertebrates make up a huge portion of all life in the sea. Invertebrate sea life includes:
Bryozoa, also known as moss animals or sea mats;
Cnidaria, such as jellyfish, sea anemones and corals;
Crustaceans, such a such as lobsters, crabs, shrimp, crayfish and barnacles;
Ctenophora: sea worms including flatworms, ribbon worms, annelids, Sipuncula, Echiura, Chaetognatha, and the phoronids;
Echinoderms, including starfish, brittle stars, sea urchins, sand dollars, sea cucumbers, and crinoids;
Mollusca, including shellfish, squid, octopus;
Sponges;
Tunicates, also known as sea squirts.
As on land and in the air, invertebrates make up a huge portion of all life in the sea. Invertebrate sea life includes:
Bryozoa, also known as moss animals or sea mats;
Cnidaria, such as jellyfish, sea anemones and corals;
Crustaceans, such a such as lobsters, crabs, shrimp, crayfish and barnacles;
Ctenophora: sea worms including flatworms, ribbon worms, annelids, Sipuncula, Echiura, Chaetognatha, and the phoronids;
Echinoderms, including starfish, brittle stars, sea urchins, sand dollars, sea cucumbers, and crinoids;
Mollusca, including shellfish, squid, octopus;
Sponges;
Tunicates, also known as sea squirts.
