Balanoglossus(Movements & Feeding)

The worm is sluggish and little affected by external stimuli.It moves in its burrow by cilia covering its body surface.The most active part is proboscis.It elongates and shortens by muscular activity and helps in burrowing.
It swallows sand or mud to obtain diatoms,protozoans,other micro-organism and organic detritus on which it feeds.