The Slug Mother is a common enemy that spawns in the Deep Jungle. When attacked, it will spawn a Slug Lord from the bulb on its head, but on occasion, will spawn an emblem instead. They move very slowly, and as a result, pose little threat to the player.

The Slug Mother is replaced by the Luminescent Slug Mother on Challenge Level 1 and above. Luminescent Slug Mothers have much more health and damage than their lesser brethren and spawn Luminescent Slug Lords instead of normal ones when damaged.

Oddly enough, the sprite for a burst Luminescent Slug Mother is identical to that for a burst Slug Mother.