Asboreans are worm-like creatures, which wear a mobile armor resembling that of a horseshoe crab. It attacks by sliding around along the ground, trying to ram into Samus, shooting smaller Asborean Spawns that home in clusters, and by getting up onto its hind legs and trying to headbutt or swipe.
When it moves its head back up to swipe, it reveals its glowing red weakpoint. It may expose its head for a short time after sliding around, making itself vulnerable - a single Charge Beam shot will stun it in this case. After sustaining significant damage and becoming downed, performing a Lethal Strike will, instead of killing, rip the creature from its armor, leaving the Asborean Cortex exposed and incredibly weak to sub-zero temperatures (a single Ice Beam shot completely freezes the unarmored Asborean and another finishes it off). However, if not killed immediately, the Asborean will wrap itself around Samus and self-destruct to cause significant damage.
If Samus tries to Overblast the Asborean, it will simply push her off; it can only be done when the Asborean is stunned.
The Asborean is often treated throughout Metroid: Other M as a miniboss, fighting it alone with special music. On Hard Mode, it summons an increased number of Asborean Spawn when its neck is extended, making it harder to Lethal Strike.
Only three are found in the Pyrosphere - two in the Floor Observation Room at different times and one near the elevator to the Main Sector, but a duo attacks Samus in a corridor before the Control Bridge.
- If the unarmored Asborean is left frozen, it will die shortly.
- Concept art reveals that the Asborean is a hybrid, having become so when a mechanical weapons component was crafted onto a primarily organic base.
- According to the concept art, the spikes on the Asborean's armor are Missiles and could be fired at its opponents. However, the creature never performs such a feat in the game.
- The Asborean can be seen clinging to the wall in each appearance, coming down to fight Samus when she reaches a certain point in the room.
|Hybrids||Asborean • Chozo Statue • Darkling • Dark Samus • Dark Suit • Light Suit • PED Suit • Samus Aran • Unnamed Suit|
|Bio/Mechanical||Aurora Unit • B.O.X. Security Robot • Cortex Chamber • Dark Diligence Drone • Dark Ingsmasher • Dark Quad • Fusion Suit • Mother Brain • Nightmare • Quadraxis • SA-X • Space Pirate Boarding Pod|
|Cyborgs|| Crash Pillar • Cyborg Zebesian • Ghor (-G) • Kyratian • Leviathan Battleship • Pirate Militia • Preed (Dark) • Puffer Mine • Ridley (Meta/Omega) • Samus Aran • Slench • Space Pirate • Weavel • Zebesian |
Large Leviathan-class armed ship • U-ton