What are three adaptations that allow fish to live in water?

1. Gills: Fish use gills to extract oxygen from the water. Gills are feathery structures filled with capillaries, which allow for the efficient exchange of oxygen and carbon dioxide.

2. Streamlined Bodies: Fish have streamlined bodies that reduce drag in the water, allowing them to swim efficiently. Their bodies are often fusiform (torpedo-shaped) and covered in scales, which further reduce resistance.

3. Swim Bladders: Many fish have swim bladders, which are gas-filled sacs that help them control buoyancy. By adjusting the amount of gas in the swim bladder, fish can rise, sink, or stay at a specific depth.