1. Peng is a Hawaiian giant porcupine fish.
2. Porcupine fish and puffer fish are similar and porcupine fish are referred to as pufferfish but they not the same species.
3. Porcupine fish are also called blowfish, balloonfish and globefish.
4. They have spines instead of scales.
5. If they are scared they gulp in water to make themselves puff out which makes their poisonous spines stick out and stops them getting eaten.