triploblastics

Are Fish Triploblastic? Triploblasty can be seen in multicellular animals, particularly, flatworms (Phylum Platyhelminthes), mollusks (Phylum Mollusca), arthropods (Phylum Arthropoda), and chordates (Phylum Chordata). Animals that are not triploblastic are some invertebrates like sponges (Phylum Porifera) and cnidarians (Phylum Cnidaria). Is Sea a triploblastic animal? The phylum Cnidaria (sea anemones, corals, hydras and jellyfish) is