Winner of the American Association for the Advancement of Science/Subaru Science Books & Films Prize for Outstanding Science Series A tadpole is a baby frog! Female frogs lay masses of jelly-coated eggs in the water, but what hatches from each egg isn't a frog yetit's a tadpole. Tadpoles are likely tiny fish that breathe underwater through gills. As the tadpole gets older, it loses its fishy tail and its gills and grows legs and develops lungs. The tadpole has become a frog. From Tadpole to Frog is a lovely first look at this amazing metamorphosis.