What are Aquatic Animals

   What are Aquatic Animals

Aquatic animals are those animals that live in water. Those that live in ponds, lakes, and rivers are freshwater animals. The animals that live in the ocean are called marine animals. Some aquatic animals breathe oxygen from the water through gills, while others go to the surface to breathe air through lungs. Like Molluscs include a large group of invertebrate aquatic animals such as squids, octopuses, cuttlefish, snails, slugs, mussels, clams, scallops, etc. They have soft bodies, no spine or skeleton and many of them are covered with a shell. They make up about 23% of all marine creatures. Cuttlefish, squids and octopuses have highly advanced nervous systems.