Aquatic animals are animals that live in water, such as fish, dolphins, and whales. Two examples of aquatic animals are otters and seals. Otters are semi-aquatic mammals that have long, slim bodies and webbed feet. They are found in rivers, lakes, and oceans around the world. Seals are also semi-aquatic mammals that have streamlined bodies and flippers. They are found in coastal areas and can be seen in the Arctic and Antarctic regions.