I'm in the process of cycling my 40 gallon tank and I bought some live rock to help. A few minutes after I added the rock to the tank, I saw a bunch of what appear to be baby brittle stars crawling around the bare bottom. How do I care for them? Should I leave them in the tank while it cycles, or will they die in the process? Should I move them to my quarantine tank and possibly never find them again? What do I feed them? I know, a lot of questions, but I've never owned a starfish before. Thanks for the help in advance.