Lurkers appear as bald male humanoid monsters with huge claws, resembling mermen. Their legs are fused together or bound by layers of dead skin, so they drag them uselessly behind them. Their faces are blank save for a huge, vertical slit down the middle of their heads, filled with horrific teeth. Most notably, their wrists are severed and a series of three, sickle-like blades are grafted on to the stubs of their arms. They use their arms to crawl and attack. If one looks closely at the Lurker's arms one can see three small breathing holes on each of the Lurker's arms.