I'm also unsure of the official name now days but when breeding a Platy X normal the 50% of the babies that aren't lesser I've read called platy sibs or hidden. I think hidden describes them well because apparently not only do the heterozygous hidden with normal look like normal balls it looks like the homozygous hidden's also look normal. RDR did quite a bit of hidden X hidden breedings early on and reported no different looking offspring. Later he bred platy X platy and produced a normal looking baby that would have been a homozygous hidden. If he breeds that normal looking homozygous hidden to a homozygous lesser leucistic he should get 100% platy.

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