Hello, I'm hopeing someone can help, We bought a little chunk of live rock and to our suprise, when we brought it home there was 3 little pinkish/purple colored anemonies stuck to the rock. We upgraded to a fourty gal. tank from a 15-20 gal. and they looked like they were dying for about 2 weeks, then BAM all of a sudden we have counted over fourty babies! Their takeing over. Does anyone know what kind they are? Will they keep multiplying? And are they going to damage our ecology, and kill our fish and other creatures? Please help, Thanks.