Frogs pass flame retardants from food to eggs.

Frogs pass flame retardants from food to eggs.
http://www.environmentalhealthnews.org/ehs/newscience/pbdes-pass-from-food-to-frog-to-eggs/

"Commonly-used flame retardants can accumulate in frogs where they can be passed from a mother to her eggs and on into the next generation, potentially affecting amphibian populations."