My multicolor shares a RSM250 with two small orchid dottybacks. It seems to enjoy barelling through the tank and scattering the dottybacks, but I think it's actually a timid fish that was bullied in its previous tank. It prefers very small food items like fish roe, and I have to take care that it gets a fair shake at the food before the dottybacks vacuum it up. It spends a lot of the time playing with the wash from the powerheads and surfing the currents. It is, hands-down, one of the most gorgeous fish I've ever seen: when the anemic moonlights are on, the white parts of the fish glow yellow and contrast wondrously with the blue markings.