Nice. I've had a Rock Beauty for exactly 2 years now, it's about the same size as yours, maybe 3". Mine gets a variety of frozen foods, Seaweed Extreme pellets and nori, he'll eat pretty much anything I offer it, he's got a decent amount of body mass, and is a swimmer! He's definitely the most curious and active fish I have. But this particular fish hasn't grown one bit since I've had him. He's going into a much bigger tank as soon as I can get a house built and tank set up, I'm hoping that'll trigger something with him to grow lol. I've said this several times now, he may die of something but it certainly isn't going to be from malnutrition