Flipper
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Humpback_flipper.jpg/150px-Humpback_flipper.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/SwimFins_02.jpg/150px-SwimFins_02.jpg)
A flipper is a special kind of limb that is flattened like a paddle for moving through water. Many animals that live in water, such as whales and seals have flippers. The flipper of a fish is called a fin.
It can also be an item worn on the foot to help people swim more easily.