I saw a water rail in the park pond.

Mr. Teramizu is my best friend.

This warm water is ideal for warming the body.

There are many water fleas living in this lake.

The water deer is the same type of deer as the sambar.

A water spider can walk on the surface of the water.

There were water striders floating on the pond.

The hippopotamus is a very rare animal.

A whirligig beetle is swimming in the pond.

He is an expert in hydrology, and his research is highly valued around the world.