Killer Flatworm: New species hunts with puffer fish toxin

A newly discovered saltwater flatworm, pale yellow and about the size of a silver dollar, can take down mollusks in their shells, thanks to a powerful neurotoxin also found in puffer fish.

LUNCH DATE. A newly discovered flatworm from Guam wraps its body around a cowrie in its shell, paralyzes it with a nerve toxin, and pulls out the red body in about half an hour.