Got this guy about 9-10 months ago as a 2 inch juvenile. So I got to see him go through his color changes. When he gets fed or startled he grunts and makes enough noise you can hear him across the room. Today I took a rock from one of my smaller tanks that was covered in aiptasia and swapped it with one from the FOWLR. I do this not only to clean up the small tank, but because the Raccoon Butterfly in the FOWLR LOVES the aiptasia. Anyway not only was the Raccoon eating the aiptasia, the Emperor was chowing down on them too!