Unknown[Metroid Prime]

Metroid Prime

Unstable gas-filled organism. Will rupture on contact. Puffers fill their bodies with lethal meta-viprium gas and float about in search of food. If ruptured, the gas within the Puffer is violently released. Despite their fragile bodies, Puffers are aggressive hunters. The gas cloud they release upon death is often fatal to the creature that brings them down as well.