The Sporegrub is a member of the Mandiblard Family featured in Hey! Pikmin. The Sporegrube are small, purple Mandiblard with two range of four spikes on the back and the ability to produce poison.
The Sporegrub usually live in holes on the walls and descend on the ground by using some kind of vines that are unclimbable for Captain Olimar and the Pikmin, they are also able to emit poisonous gazes but are able to be killed in one hit.
Hey! Pikmin Log
"A mutant variety of Sheargrub that lives in certain types of grass. It guards its territory with bursts of toxic gas. I've noticed similar behavior in my dog back home, but it takes much less to set Bulbie off."