Webling

appear in Metroid Prime 2: Echoes at only one point in the game, in Feeding Pit Access in Dark Agon. There are two that block the way, and can be killed by the Light Beam. Once done, they are never seen again, making their scan critical.

Logbook entry
Metroid Prime 2: Echoes: ''Weblings spin a network of energized snare lines, then sit in the middle and wait for prey to get caught in it, much like a spider. A webling is incredibly durable, though it has the darkling weakness to light.''