What animal possess gills when young and develops lungs during thew adult stage?

Many amphibians, such as frogs, possess gills in their larval stage (tadpoles) and develop lungs as they transition to adulthood. This remarkable transformation, known as metamorphosis, allows them to adapt from an aquatic environment to a terrestrial one. As they mature, their gills are reabsorbed, and they develop the ability to breathe air through lungs.