nerve net

What Organism Has A Nerve Net? Nerve nets are found in species in the phyla Cnidaria (e.g. scyphozoa, box jellyfish, and sea anemones), Ctenophora, and Echinodermata. Cnidaria and Ctenophora both exhibit radial symmetry and are collectively known as coelenterates. Do sponges have a nerve net? Sponges are the only multicellular animals without a nervous system.