The posterior segments of the worm bear hooked bristles which help anchor it in its tube.

[4] The range of E. polymorpha extends along the western coast of North America, from Alaska to California.

[6] Eudistylia polymorpha is a filter feeder, catching food particles with its pinnately branched radioles.

These are trapped by the feeding appendages and moved by cilia down grooves in the radioles to the large, funnel-shaped mouth.

The gut takes up most of the coelom space and there is a faecal groove for ejection of undigested debris.