Fish

Fish

Fish are important for understanding the early evolution of vertebrates and how life adapted to aquatic environments over time. They demonstrate a wide variety of body structures, behaviors, and survival strategies that have helped them thrive in oceans, lakes, and rivers around the world. ...

Have you ever wondered how fish survive underwater?

Unlike humans, fish don’t have lungs. Instead, they use gills to extract dissolved oxygen from water.

Fish have streamlined bodies for smooth movement through the water and paired fins—the tail fin propels them forward, while the side fins aid in steering.

They are ectothermic...