Zoology 10th Edition by Stephen Miller,John Harley

تمرين 11

Nereis and Glycera are representative errant annelids. They are marine predators that burrow in sand and mud during much of their lives. They use an eversible proboscis and jaws in preying on small marine invertebrates. Both worms undergo reproductive swarming that is correlated to the lunar cycle. Fireworms feed on coral polyps and small crustaceans. Their venomous setae can inflict painful stings.
How is the method of gamete release during spawning of both Nereis and Glycera different from that of some other polychaete annelids?