I stripped 9 fry from one of my female Electric Yellow Labs about 6 weeks ago. At the time, she had been holding for nearly four weeks, so the fry were very well developed. They're now about 6 weeks old and a little over 1/2" long. 2 of the fry are clearly white, almost like a pearlmutt lab. I noticed this as soon as the other 7 started to color up and assumed they would eventually show color too, but they haven't. Their eyes are black, so they aren't albino. Is it common to get white offspring from yellow parents? Are they desirable to anyone?