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 yet—it's a tadpole. Tadpoles are likely tiny fish that breathe underwater through gills. As the tadpole gets older, it loses its…