"The creatures live in pools of acid - which they spit back out at you if you approach."
These red aquatic bugs constantly jump vertically out of the purple acid they live in. They have two tentacle-like arms coming out of the top of their segmented thorax. They have purple pulsing eyes, and small antennae on their head. When Trace approaches, they fire four drops of acid. Two fire horizontally in opposite directions, two upward at 45 degree angles. The acid drops have a blast radius after hitting a solid surface.
When corrupted they take on the behaviour and characteristics of Giant Diatoms, moving at 45 degree angles and bouncing off of terrain. They no longer fire drops of acid.