When the embryo begins to grow legs grew long tail begins to shrink. Lungs begin to develop. Adult Somboon tail the tail is lost and had to breathe with lungs.
When the young grow up legs begin to sprout out of a long tail would begin to shrink. The lungs start to develop. When full grown, teens get a tail tail disappears and breathing with lungs.
When the light starts to grow, his legs grew out the long tail, it will start to shrink down lung will begin to develop when fully grown perfect tail that had a tail will be lost and will be breathing lungs.