Ok, so I'm new to this. As in I've only had a saltwater tank for about 2 weeks, new. I bought a 75g tank with coral, fish, rock etc included. When I bought the tank the person told me a bit about the coral, but never mentioned any anemones. However, I got a bit suspicious when what I thought was some kind of shroom moved from one part of the tank to another over night!! From the position it's in now I can see the foot pretty well. I have three of these in the tank all together. I could be way off and it's something else. Basically I just wanted to know what it is and if I need to do any special feeding. Thanks in advance for the help. I'm liking MAAST so far!!!