
Fugu is the Japanese term for a fish native to the Pacific Ocean. The name comes from fuku meaning "to swell" . It is the generic term for any fish in the Tetraodontoid family; these are the 'puffer' fish, also known as blowfish or balloon fish. It is a rather unattractive fish, which has the ability to puff its body up to 300 times its usual volume and extend spikes for protection. The fish pumps air or water into the first two thirds of its stomach. The skin is able to stretch due to collagen fibres that reinforce it, also providing strength. If it is caught and eaten, it has been known to inflate after it has been swallowed, killing the predator, and then gnawing its way out of the stomach. If this doesn't work, the predator will die from the toxin.