Puffer fish blow up on their enemies. It eats little fish. When it blows up it has spikes on its body. When its predators get spiked the puffer fish eats it. Puffer fish swim at the bottom of the ocean where it is dark. Puffer fish are slow swimmers. Puffer fish sometimes are near coral reefs. When a shark spots a puffer fish and the puffer fish spots a shark it blows up. That is the way that it protects itself. Some puffer fish are big, and some are small. There are puffer fish families in the bottom of the ocean.