Lurkers

The Necromorphs have no qualms with killing infants, and worse still, no hesitation in assimilating their bodies into their ranks. The result is a "Lurker". These creatures attack using three spiked tentacles that grow out of their back either in melee when they ambush Isaac or using them to attack at range with some sort of projectiles jetting outwards from the end of the tentacles. They are used as ranged support for other Necromorph forms and only melee as a last resort or to surprise. Lurkers are able to climb walls and stick to ceilings with suction cup-like appendages grown out of their stomachs. As a result, they're found quite often in Zero-G environments along with Leapers. They are commonly sighted either in small groups or with other larger Necromorphs.