Polar bears are a species of bear that lives in the Arctic sea ice.
Sea turtles are large, cold blooded animals that come into the category of reptiles.
Penguins are a group of flightless birds that are mainly considered to be aquatic animals.
Sharks are fish that belong to the family of fish that have skeletons made from cartilage which is tissue that provides them more flexibility and lighter weight than bone would.
Seals are mammals that spend relatively less time on the land than they do in the water.