So last night I tried a trick referred to me from a reefer friend. Cut the top off of a 2 litre bottle, invert it, place some food in it. The damsels will go into it, and not be able to come out. The come out part is correct. Except it was starfish, snails, shrimp. No fish at all, and the serpent star I have had for 8 years died in the process. Any other ideas on how to catch these little REEF DEVILS. I have added two Flame angels, and they have killed them both, just by chasing it around for so long. Any help will be greatly appreciated.