I had to make a super quick QT tank about a month or so ago due to me being sold a piece of live rock full with zoas for $50. Well of course I didnt see all the aiptasia on it and they opened up once in my tank. Well i quickly removed it and setup this 10 g tank and put the rock in there. I do not care about this tank as I have already fragged some zoas off the rock and put in my tank. For giggles I have kept it up and running and I am seeing tons of different life coming out. In particular there are hundreds if not thousands of these critters all over. What are they?