Konbanwa, Shana's Mom! (And Shana, too!!)

I've never heard about a leucistic tadpole either, among frogs. There are leucistic morphs of the Axolotl, a Mexican salamander, which is endangered in the wild, but breeds well in captivity. Your daughter's tadpole looks very much like the young leucistic Axolotl in color.

There are albino American bullfrogs, Argentine horned frogs and others, and I have seen an axanthic (blue!) bullfrog in the wild - but those have little to do with the leucistic mutation.

I doubt that the mutation is caused by pollution, but I suppose it's possible. Most of the amphibian mutations I've heard being tied to pollution were deformities of the limbs.

In any case, that's a totemo sugoi discovery! I hope your Shana's frog does well, and that her Summer Research project is well received too. Perhaps she can reproduce this rare amphibian!?

Ja mata!

~Bruce