Gel

Gel is the standard hostile slime. It sits, wobbles, and then turns itself into a body check.

The attack is simple. A Gel waits between jumps, then launches at the nearest bother. Contact only hurts when the jump has real speed behind it, so the danger is the moving impact. Standing next to a resting blob is not the main problem.

They appear in wet and unstable biomes such as Flood, Shower, and other water-heavy spaces. The normal reward is goo, and the gel capsule is an easy way to set up repeat slime farming once you have one.