Gel Puffer

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Gel Puffers are creatures native to Bryyo. They feed on toxic vapors put out by Fuel Gel. This allows them to float in the air, but also weakens them and makes them vulnerable to attack.

[edit] Logbook entry

Metroid Prime 3: Corruption: "The exposure to Fuel Gel has left the shell of the Gel Puffer highly susceptible to weapon fire. Gel Puffers have come to rely on the toxic vapors given off by Fuel Gel for sustenance. They process these gasses and then expel the excess to stay afloat. The brittle shell of the Puffer, while durable in appearance, is rather thin and easily damaged."