(1) Sponges are simple aquatic animals that live in water and have pores that intake and output water. They come in different shapes and have skeletons made of either silicon or lime. Sponges reproduce both sexually and asexually. (2) Cnidarians are a phylum of aquatic animals that include jellyfish, corals, sea anemones and hydra. They have radial symmetry and live in bodies of water. Cnidarians reproduce both sexually, going through polyp and medusa stages, and asexually by splitting their bodies. They feed through passive predation using stinging cells.