-As likwid said fish is'nt really the best choice, but it just occured to me that you might be able to get away with a clown goby like a citrinis or such. there not too demanding, quite hardy actually, and putting a baby in a 5-gallon with nicely arranged live rock doesn't seem to bad an idea to me but research first - i see them all the time lingering over stony coral colonies so i can't imagine them needing to much swimming room, but anyways good luck
