i found this worm under a peice of live rock. it berrys its self in the sand. it has long tan and dark brown striped tenttical like arm things @ the front of its body. it also has shorter red tenttical things behind the long ones. its body is about 2 inch. long. the long tentticals are about 3 - 4 inch. the brown and tan tentticals go under the sand and can stretch very far. the red tentticals stick out of the sand and look like small red kelp is growing. it is very ugly
. is it bad or good? it also curls up to if that helps any.