Ingclaw

In Metroid Prime 2: Echoes, the Ingclaw was a nonsentient Darkling that lived on Dark Aether before its destruction. Ingclaws live attached to walls or floors in large clusters. They survive by inhaling biomatter from the surrounding atmosphere, excreting a toxic gas that exacerbates the draining effects of Dark Aether's atmosphere.

Description
Ingclaws are immobile, egg-shaped darklings that vary greatly in size -- some have been observed to attain heights of over six meters. They are primarily black and purple, like most darklings. The blunt end of the Ingclaw's body is rooted in the ground, and the tapered end features an orifice for collecting food and four protective claws surrounding it.

Behavior
In addition to the constant feeding process undertaken by the Ingclaw, a few other adaptations are observable. The Ingclaw can enter a dormant, protective state in which it neither feeds nor excretes toxic gas. However, personnel weaponry has no effect on Ingclaws in either their active or dormant states, rendering this ability somewhat superfluous to the darkling's self-protection. Ingclaws reproduce by means of spores emitted alongside the excretory gas, which may explain the highly concentrated populations found on Dark Aether.