Inflates its body when threatened?

The pufferfish, also known as a blowfish, is a type of fish that has the ability to inflate its body when threatened. This inflation is achieved by swallowing water or air, which causes the fish's body to become much larger and rounder. The purpose of this inflation is to make the pufferfish appear larger and more intimidating to potential predators. In addition, the pufferfish's inflated body also makes it more difficult for predators to swallow. Some pufferfish species also have spines on their bodies, which can further deter predators. Pufferfish are found in both marine and freshwater environments, and there are over 120 known species.