Ghost Slug

Photo: Amgueddfa Cymru/National Museum Wales, Cardiff University

Meet the ghost slug, earthworms' worst nightmare:

The nocturnal predator is armed with blade-like teeth (see inset) for slicing through animal flesh and can measure up to 5 inches (13 centimeters) long when stalking its prey, Rowson said.

"They engulf the worms piece by piece," the biologist noted. "One end of the worm will still be alive while the other is being gradually ratcheted into the slug by the teeth."

The slug has been officially named Selenochlamys ysbryda ("ysbryd" is Welsh for "ghost."): Link - Thanks Ratz!