Caudal Fin

Imagine trying to move a heavy shopping cart across a parking lot with a broken wheel. Just like how the shopping cart needs a functioning wheel to move smoothly, a fish relies on its caudal fin, or tail fin, to propel itself efficiently through water. The caudal fin acts like that crucial wheel, providing the necessary push and direction, allowing the fish to navigate its aquatic environment with ease, much like how a working wheel allows you to steer and control the shopping cart.