The ghost slug, Selenochlamys ysbryda, is a species of predatory air-breathing land slug.
It has no eyes, and is white in color. It is nocturnal and burrowing, and unlike the majority of slugs, it is a carnivore, feeding on earthworms at night using its blade-like teeth.
Because of the slug’s white color and nocturnal habits, and because it has been so rarely seen, it was given the species name ysbryda, the word “ysbryd” meaning ghost in the Welsh language. This in turn gave rise to the common name, “ghost slug”.
An excellent candidate for “Things I never want to see evolving into giant versions of themselves…”