Ok, I don't have a clue where this came form or how it got in the refugium, but it's there. We have a strange looking red worm thingy, that is about 1 to 2 inches when fully extended out of the live rock crevese it's residing in. It's red or maroon with like spiny looking ridges along both sides, it ducks back in the rock when the light comes on or hen we go over to try to take a pic of it I laid on the floor next to the refuge last night in the dark for over an hour and everytime I saw it I would get ready to take the pic and when I moved just alittle bit it would suck it self back in the rock. Any ideas?