Well I spotted him very briefly inside his newly acquired bolt-hole. I hope he'll come out, hasn't really eaten yet. I took a dropper and squirted some brine shrimp for him to get if he's starving. I don't want to only feed him this way though, I want him to come out. Although these fish don't need a huge swimming area, I'd like to see him come out, which I'm sure he will once he gets used to it. I know sometimes it takes months for fish behavior like this to change.