Some Dottybacks can become quite aggressive overtime in the aquarium, i advise that dottybacks should be one of the last additions to the aquarium. The Royal Gramma, they are one of the most peaceful fish to put in the aquarium with the most viabrant colours that dont get washed out with size unlike its look alike cousin the Royal Dottyback were there colours wash out with size. Hawks are a very placid and hardy fish. They are great for any beginners that want some colour.