Appearing in groups, they slowly float around a room, only moving in 45° diagonal directions, bouncing off solid terrain. They look like pink glazed donuts with white sprinkles.
Corrupted Form Edit
When corrupted, Giant Diatoms move the same, but can destroy some solid terrain that is impervious to all of Trace's weapons and upgrades except the Red Coat. When corrupted, Spiru, Laser Urchin, Giant Boulderback and Giant Greenworm also have this ability.