Some time around the mid 80s I read an article in an American fish magazine (Tropical Fish Hobbyist) about a white yabby (of course, they don't know what a yabby is and unlike Australians they understand that they are crayfish). They were calling it an albino, although at one point in the article they pointed out that the eyes were black (this was shown in the many pictures) and they questioned what the trait actually was. There was a lenthy article about it, and the planned breeding project, they were quite excited about it and apparently it was very unusual, although I never heard any more about it. Of course, their species are extremely distantly related to ours, but it's interesting to see the same trait popping up in both. The blue ones are quite common, I've seen them all over Victoria and they pop up in shops. It's surprising no one has commercially bred white ones, at least not that I've heard of.