A tadpole is the larval stage of a frog or toad, typically found in water. They have a distinct oval shape, a long tail, and no legs. Tadpoles breathe through gills and primarily feed on algae and plant matter. As they grow, they undergo a process called metamorphosis, where they gradually develop legs and lungs. During metamorphosis, tadpoles lose their tails and gills, transforming into adult frogs or toads. This life cycle is crucial for the survival of the species, as it allows them to adapt to different environments. Tadpoles are often found in ponds, lakes, and streams, where they play an important role in the ecosystem.