Shadow Sheargrub

Shadow Sheargrubs are the name given to the mandiblard-like beings that appear from the shadows and overcome their prey through sheer numbers. Their eyes glow yellow and they can be pretty relentless foes. When defeated, they dissolve on the spot, suggesting that they might even be a natural phenomenon interpreted as living organisms, like the Waterwraith.

Trivia

 * The naming of Shadow Sheargrub is partially a throwback to the standard "Heartless" enemies of Kingdom Hearts, the Shadows. Like the Shadows in the game, Shadow Sheargrubs are weak enemies that appear to be similar and attack in large numbers and unexpectedly.

=In other games=

In Pikmin: Shadow Planet
This creature is one of many that this game is based on. They are completely black and have huge, grey eyes. If they bite your pikmin, they will spit them back out as Shadow Pikmin.