Bulbacoke

The Bulbacoke is a species of amphituber that spews or secretes a brown effervescent fluid comparable to acid.

=User versions=

Pikmin maker's version
The Bulbacoke is an amphituber that produces a hot effervescent fluid similar to acid to secrete through its skin for defensive use. When it shakes, the Bulbacoke's internal pressure rises sharply, prompting a reaction in the fluid and causing it to erupt from the creature's skin. Any Pikmin that touches the fluid dissolves eventually and refuses to obey the Prince of Pikmin. Bulbacokes are easily charmed by Yellow Wollyflops.