This guy truly has a face that only a mother can love. These live all over my sand bed. They also live inside little holes in the live rock. Their little tentacles radiate over the surface of the sand drawing in what bit of detritus or food they can find. My crabs can't walk an inch on the sand without tripping on a tentacle belonging to one of these guys. Someone looking at my tank was horrified to learn that there were worms living all over the place. They are indeed pretty disgusting looking. Occasionally, one will make its way on to the surface of the glass to pose for a picture. They say these guys are excellent sand sifters and are a valuable member of your clean up crew. Just don't tell your visitors they are worms.
