I recently introduced a keyhole from quarantine to my 55 a week or so ago. He hid for about 30 mins, but ever since hes at the front of the tank, picking through substrate, or at feeding, even up to the top of the tank. In quarantine, he hid for a few days, until he recognized 'food guy' and meets me at the glass ever since. Length is maybe an inch (quite young) and tank mates are a full grown angelfish, 4 inch long pearl gouramI and corydoras. Do they deveope shyness, or did I get a very out going one?