I am guessing that the coloration has a lot to do with age. For such a groovy fish, I have not found a lot written about it. Justjoe's picture appears to be a more mature specimen. There is more yellow and less Red/blue. It is also more pink than the light green mine is. The bands on the operculum are also broken insted of the three distinct lines. Anyone know if there are regional differences between Arc Eyes? Is it an age thing or if they were collected in different areas? Hmmmm, maybe someone in a different part of reefcentral might know. I'd be interested to know.