If a new animal was discovered that spent half of its life underwater breathing with gills and half of its life on land breathing with lungs, which group of animals would it most likely fit into? fish amphibian mammal insect
Fish has gills so it is not that one. Mammals have lungs but can´t breathe underwater. Insects die of water mostly. So it has to be Amphibian because they can breathe underwater with gills and on land with lungs.
