Im positive its a recent thing. In the time iv had this fish iv spent a good chunck of time just looking at him and admiring this fish lol if it is diet releated I hope to have him on a more varied diet once he starts accepting different foods. Right now he just eats talapia and frozen shrimp from the grocery stores. Im trying to stuff his food with hikari carnivore pellets, but its like hes aware I did something to the food and wont touch it yet. Hopfuly soon ill have him eating stuffed talapia and shrimp.