The same can be said if the zombie worm Osedax goes missing from the ocean floor. How the zombie worm devours bonesFirst discovered in 2002, Osedax worms measure about one to three inches long. Zombie worm (Osedax) on a bone. Through 10 years of observation, their high-resolution cameras did not pick up a single zombie worm colonization of these bones. Preliminary data from on other whale fall research near a different site suggests that zombie worms may also be affected elsewhere.