Weak to: <weaknesses>
- Has a long-term ACC debuff attack.
- Brain Clams are slow movers but great knockbackers. My Density is effective against Brain clam's strong knockback. Footspeed buffs can easily help to escape them.
- They are considered as a Hostile animated, as said by Marshall when he was exploring the Shallow Sea and Undersea Ledge.
- They clump together as a group or sometimes stay alone, depending on how they are placed on the map.