Sipunculida, Peanut Worm

The sipunculan body is divided into an unsegmented, bulbous trunk and a narrower, anterior section, called the “introvert”. When threatened, Sipunculid worms can contract their body into a shape resembling a peanut kernel—a practice that has given rise to...

Spoon Worm

These worms live in soft sediment, creating burrows from which they extend their proboscis to search for food particles.…

Cirratulid

Cirratulidae is a family of marine polychaete worms. Members of the family are found worldwide, mostly living in mud or rock crevices.[2] Most are deposit feeders, but some graze on algae or are suspension feeders.…