The Slench is an Alimbic mechanoid, similar to the Cretaphid, that Samus must fight at the end of four areas of Metroid Prime: Hunters. There are four different Slench units, each resembling a giant robotic eyeball. Each consists of two forms, A and B. Each Slench is invincible during its "A" form, and is attached to a wall (or ceiling, in Slench 4's case) by three tentacles that power the energy blasters used to attack Samus. After the synapses take enough damage, the Slench becomes aggravated and detaches from the wall; it is vulnerable in this "B" form, although it continues to attack Samus.