>>11423699We don't need anymore mutations since we've created technology to breath underwater, abet no literally breath water, but it's good enough. The intelligence mutation can make a species breathe underwater.
Without technology, we would need an adaption called gills. You can find gills on fish. Or, you could take the mammal approach like whales and dolphins and take one big breath from the air then go back underwater. Or you could become an amphibian and absorb oxygen through your skin.
