Preeds are poison filled cybernetic organisms used for Space Pirate patrols. Their bodies are armored, but if the armor is breached the Preeds will explode killing most nearby creatures. Samus encounters Preeds only in Torvus Bog. Preeds are based on the extremely similar Metroid Prime Puffers.
- In the Japanese version, the English translation of a Preed is "Puffer," the same title as their Metroid Prime counterpart.
- "The cybernetic Preeds are aggressive hunters used as patrol animals by the Space Pirates. They carry lethal Nohadin gas for use as a defense mechanism. If a Preed is ruptured, the gas within is violently released. This often proves fatal to the Preed's killer." — Logbook "Preed" (Metroid Prime 2: Echoes)