ELI5: Explain Like I'm 5

Aquatic locomotion

Aquatic locomotion is the way animals move in the water. Some animals live in the water all the time, while others only visit it occasionally.

In order to move in the water, animals use several different methods.

Some animals, like fish, have fins that help them swim. Fins are like little flaps that stick out from the sides of the body, and they can be moved back and forth to push the animal through the water. Some fish also have a long tail that they use to steer.

Other animals, like sea turtles, use their limbs to swim. They paddle through the water with their arms and legs, just like a person doing the breaststroke in a swimming pool.

Yet other animals, like squid, use jet propulsion to swim. They take in water through a special hole in their body, and then blast it out through another hole to propel themselves forward.

Overall, aquatic locomotion is the way animals move in the water, and there are many different ways to do it depending on the type of animal.