These smaller parasitic Lambent are crab-like with six legs and a small abdomen. They are normally spewed from Lambent Stalks and mutated Drudges. Like all other Lambent forms, they have black, rock-like skin with glowing yellow Imulsion-like blood. They spit a noxious, Imulsion goo when threatened and can swarm over floors, walls and ceilings to blow up at an enemy's feet. They are physically similar to Wretches, as they can climb on walls, but are more closely like Tickers gameplay-wise. They also act to spread the Lambent infection to other Locust, mainly Drones, by attaching themselves to their backs.
According to the E3 Demo, the Polyp will swarm from larger Lambent to attack the player. They have very little health; entire swarms being easily defeated by Lancer fire. However, the explosive damage is high when fought at too close a range, and can cause a lot of damage when exploding in packs.