Is there such a thing.....

[atxchris1234]

As itch on an emerald crab?
I have 2 emerald crabs, as I recall, when I bought them they were totally blueish green. I noticed yesterday that one of them seems to have white spots on his back. It will be very difficult for me to get pictures of this, as I only have an iphone for camera and the emeralds don't come out in the open very often.

Do emeralds get white spots on their backs as they mature? Or do I need to make this a high priority?

Edit - BTW my clown looks just as good as the day I got him