Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids, or both (hence they are trimorphic). Four examples of cnidaria : A jellyfish Chrysaora melanaster. A gorgonian Annella mollis. A rocky coral Acropora cervicornis. A sea anemone Nemanthus annamensis. Click to see full answer. Simply so, what defines the colonial organization of cnidarians?Cnidarians represent a more complex level of organization than Porifera. They possess outer and inner tissue layers that sandwich a noncellular mesoglea between them. Cnidarian species include individual or colonial polypoid forms, floating colonies, or large individual medusa forms (sea jellies).Secondly, what are examples of cnidarians? True jellyfishes Sea anemones and corals Sea anemone Box jellyfish Myxozoa Hereof, what type of feeders are cnidarians? Cnidarians are carnivores. What do cnidarians have for food? Cnidarians have stinging cells that take food into a hollow cavity.Are cnidarians Protostomes?1 Introduction. Cnidarians are early diverging metazoans descended from a common ancestor of both protostomes and deuterostomes (Fig. 8.1). The phylum contains approximately 10,000 species, most of which live in the oceans and other marine environments.