Skunk cleaner coloration – experts please

[Catspa]

Just curious has anyone noticed that the proper body coloration is suppose to be a pristeen white with a red strip and spotting. This is the way they look when brought from the wild, BUT when you put them in your aquarium, the body coloration gradually changes to orangey/yellow shade. Anyone know why this is? Food? something to do with the condition of our water? In my experience, it has nothing to do with the age of the shrimp, but rather the length of time that they have been in captivity, just not sure what causes it? Any ideas?

p.s. if your going to buy on and you have a choice between a white versus orange body - go for the white - chances are it will have better chance in aclimating, and longevity - this has been my experience.