Do you know that a porcupines can float in water? Yeah, its a real fact about porcupines. Actually the quills of a porcupines makes help to float in water. This quills have a spongelike which filling inside of a porcupines. They can use their quills to float on rivers and streams to eat all the water plants & they use the quills for defense, though, unlike what you may have seen in the cartoons, they can’t throw them at their enemies.