My Yellow Tang is smart. I had a DYI fish trap trying to catch another Tang that was causing havoc. My Yellow would go in the trap, eat a ton of food, then back out of it. He barely fit in the trap but would still squeeze in. It was entertaining to watch. He went from being skeptical, to going part of the way in, getting spooked and backing out, to "HAI GUISE, THIS IS MY NEW BUFFET RESTAURANT!". By far my favorite fish.