Science Common Sense

63 - Why do fish need water to survive?

Fish need water to survive because their bodies are designed in a special way. Here are a few reasons:

1. Breathing: Fish have gills that help them breathe underwater. They take in oxygen from the water and release carbon dioxide.
2. Body support: Water helps support the fish's body so it doesn't collapse. Since water is dense, it keeps the fish floating and comfortable.
3. Thermoregulation: Fish need water to control their body temperature. Water helps keep them cool or warm, depending on the temperature around them.
4. Movement: Fish have tail fins and flippers that help them swim in the water.

In short, fish are adapted to living in water and need it to breathe, move, and stay healthy.