Other thing you might want to do
Get a Male Axanthic and a female super gravel and a female ivory, this way you do not put all your eggs in the same basket, there will be no doubt as far as offspring go and can make this a 2 step process cutting down on time and headache.
Don't have to keep tons of animals that you may not be able to identify and have some animals that are 100% identifiable that you can sell for what they are.