How long do Noto V. V. Larvae keep their yolk sac?

[EasternNewtLove]

Some of m Noto v v larvae still have their yolk sacs. They are 8 days ol now and it's not even gone. Maybe half gone... Is this normal? Also, ransoms question but has anyone ever seen an albino Noto? I really want to see one! I feel like it would look really cool.

 

[Jennewt]

It's entirely possible for the yolk to last that long. It depends on how early they hatch (some hatch as preemies, some hatch ready to start eating). And it depends on temperature. If they are kept cool, the yolk lasts longer.

Nope, never seen nor heard of an albino Notophthalmus.