The fish that bulges when angry is the puffer fish. Pufferfish are fish that live at the bottom of the ocean. They don't like to swim and have spines all over their bodies. When they are in danger or encounter natural enemies, they will immediately fill their bodies with air or seawater. At this time, the spines on the pufferfish's body It will become hard so that natural enemies cannot harm it, and it will expel water or air from the body until it is safe.

Tip:

Every time the puffer fish inflates its body, it takes a lot of energy. It takes about 5 hours to recover every time it puffs up. If it puffs up frequently, it will cause harm to the puffer fish's health and shorten its life. So when raising pufferfish, try not to let it bulge.