protozoa, porifera (sponges), coelenterata (e.g. jellyfish), platyhelminthes (flat worms), nemathelminthes (e.g. nematodes), trochhelminthes (Rotifers and Gastrotricha), echinodermata (e.g. sea urchins, starfish), annulata (Polyzoa, Phoronida, and Brachiopoda), arthropoda (insects, arachnids and crustaceans), molluscoida, mollusca (e.g. octopus, clams), and chordata (e.g. vertebrates).