GLASS FROG
Glass frogs got their name because the undersides of their bodies look smooth and transparent, like glass. Their bellies are transparent and reveal their internal organs, such as the stomach and heart. It is possible to observe the internal organs of a glass frog, including the heart, lungs, intestines, and stomach, as they perform their digestive functions.
Another fascinating thing about glass frogs is that they spend almost all of their time at the top of a tree. However, contrary to popular belief, they do not start on the tree. Their tadpoles spend their early stages of development swimming in moving water.