The Cretaphid is a type of Alimbic defense drone. The Alimbics created them to guard sacred objects, most notably the Octoliths. It consists of a central column divided into three sections that rotate against each other, with large spots on the side. These spots are capable of shooting homing plasma or lasers. They are vulnerable when blue and can be destroyed. Once all spots are destroyed, a central crystal rises from the top of the Cretaphid. This is the only time it can be damaged. There are four versions that Samus encounters.
This is the standard model. It has three rotating sections. One of these sections will fire constant lasers through the spots, while the other spots are always vulnerable.
This model uses heat-seeking plasma as its normal shots. The spots will be red most of the time, making them invulnerable. After firing, the spots will turn blue for a time. This model has no lasers.
This model uses both lasers and plasma shots. The lasers will stop at regular intervals, making the spots vulnerable. The spots that do not fire lasers function the same as in version 2.
The most advanced model has the characteristics of the Cretaphid v3, but is also mobile. It moves about the room, making targeting the Cretaphid difficult. The column will stop moving when the crystal rises.
- "Utilizing the most sophisticated Alimbic cybernetics, this massive cylindrical defense mechanism features precision chemical lasers. The Cretaphid is a key component of Alimbic military defense technology, designed to safeguard the Alimbic's most sacred objects." —Logbook "Cretaphid v1" (Metroid Prime Hunters)
- "This modified version of the Cretaphid cybernetic defense mechanism features bursts of heat-seeking plasma. A key component of Alimbic military defense technology, it was designed to safeguard the Alimbic's most sacred objects." —Logbook "Cretaphid v2" (Metroid Prime Hunters)
- "Combining the features of its predecessors, this version of the cybernetic Cretaphid tower features both precision chemical lasers and bursts of heat-seeking plasma. A central component of the Alimbic military defense system, it was designed to safeguard the Alimbic's most sacred objects." —Logbook"Cretaphid v3" (Metroid Prime Hunters)
- "The apex of the Cretaphid line of cybernetic defenses, this ultimate model deploys lethal lasers and homing plasma from a mobile tower whose very casing is an offensive weapon. A key component of Alimbic military defense technology, it was designed to succeed where all others fail." —Logbook "Cretaphid v4" (Metroid Prime Hunters)