the last two times I rearranged the rock work in my tank, I found my randall's in the overflow box, they're so tiny! I've never spot fed mine either, and they don't have gobies yet so I'm guessing they just feed on pods and left overs. I feed my tigers bits of silversides and krill... now they get greedy and want it every day. I need to get some gobies so I don't have to target feed anymore!