Blemmy, looks just like the polyp eating nudi's that I had to battle for weeks. Check your zoo's and pull them out with tweezers. If you see them on your zoo's dip them in RO water with iodine for 7 minutes. I did that 3 days in a row and then pulled the stragglers out with tweezers, with no ill effects to my zoo's. Good luck. Let me know if you have any more questions on what I did to get rid of them.
Greg