Learn how fish swim by moving their tails side to side, just like a rudder helps a boat steer. Perfect for young kids to understand!
Imagine you're in a little boat that needs to go forward in the water. To help the boat move straight, it has something called a rudder at the back that pushes water and helps it steer. A fish's tail works in a similar way!
When a fish moves its tail from one side to the other, the tail pushes against the water. This push helps the fish move forward through the water, just like how a rudder helps a boat. The fish keeps moving its tail side to side again and again to keep swimming.
So, the fish's tail is like its special paddle that helps it swim and explore the water around it!