worms

SEM micrographs of a Glycera proboscis, showing the four eversible jaws (a) and a single extracted jaw (b). Line in b indicates the approximate orientation of microtomed sections. Credit Pontin et al PNAS 2007

This bloodworm has copper jaws and now we know why

Bloodworms are known for their unusual fang-like jaws and This bloodworm has copper jaws and now we know why. It is harvested from marine sediments