I am always expecting changes in corals when I get them. I think Acans will change as they grow up, I notice baby polyps always look different then when they grow up colors develop in the more mature polyps that are not in the baby polyps. I notice that most all corals change once they hit my water...some take months to color up to the final color, some weeks. I move stuff around sometimes to see if I can get the color I am really wanting.