I have recently set up a reef tank. I had introduced only 1 piece of live rock that I bought from maidenhead aquatics. Everything else in the tank was not live until I cycled the tank. I've had a clean up crew in for a couple of weeks and introduced a couple of clowns last week. Last night after my lights had gone out this fella came out of a shell. This shell has been in my bathroom for 15 years so there is no way he hand arrived in that. Can anyone tell me how he got in my tank and what type of starfish it is. I only have the one pic.


