Question: is there an animal that can breathe air and water

Answer: Yes, Many ancient fish had lung-like organs, and a few, such as the lungfish, still do. Some of these ancient ``lunged'' fish were the ancestors of tetrapods. However, in most recent fish species these organs evolved into the swim bladders, which help control buoyancy. Having no lung-like organs, modern amphibious fish and many fish in oxygen-poor water use other methods such as their gills or their skin to breathe air. Amphibious fish may also have eyes adapted to allow them to see clearly in air, despite the density differences between air and water.