I have one of these puffers. He doesn't do much durring the day. He just sits at the bottom of the tank in the light, unless it is feeding time. Very aggresive eaters. Mine becomes active at night and goes about exploring his tank. Just resiently he has discovered how to bury himself in the sand, very neat and didn't expect to see it from a king kong puffer. He also is always changing colors. He will go from a greenish/brownish color, to a dark brown color with green and redish spots. Very neat fish, and that price seems a little steep for one. I payed $20 US dollors on mine.