An unusual species of fish that can walk and breathe air shows that these animals may be more capable of adapting to life on land than previously thought, researchers say. They already have the capacity to walk on land and breathe air. Snakehead fish : This family of fish are obligate air breathers, breathing air using their suprabranchial organ, which is a primitive labyrinth organ. Air-Breathing While lungfish breathe air through their lungs and armored catfish breathe air through their gut, other amphibious fishes have different methods of extracting oxygen from the air. The researchers from the McGill University in Canada used 111 young Polypterus senegalus - an African fish also known as a "dinosaur eel" - for the experiment, because they are quite similar to the ancient fish that evolved to walk on land 400 million years ago. They can grow up to three feet long and breathe air, allowing them to survive on land. The northern snakehead is not alone in this ability: Walking catfishes, lungfishes, and betta fish can all breathe air directly as well. Reproduction and rearing young The answer is no, axolotls cannot live and walk on land. It could spell disaster for native species in Australia, scientists warn. The new findings may help explain how the ancient fish ancestors of humans colonized the land, the researchers said. The fish can breathe air and survive on land for up to four days out of water if they remain wet, according to National Geographic. Thus, they can’t live outside water, and won’t survive on land for long. Even though axolotls do have a capacity to breathe air, they won’t survive outside of water for prolonged periods. The aggressive climbing perch is a freshwater fish that can walk on dry land, breathe air with lungs, and tolerate saltwater. Some fish, like the arapaima, have gas bladders that are surrounded by blood vessels to enable air-breathing. The fish travel by tossing their bodies side-to-side — an equivalent to walking — according to National Geographic. An unusual species of fish that can walk and breathe air shows that these animals may be more capable of adapting to life on land than previously thought, researchers say. Polypterus is an African fish that can breathe air, 'walk' on land, and looks much like those ancient fishes that evolved into tetrapods. Polypterus is an African fish that can breathe air, “walk” on land, and looks much like those ancient fishes that evolved into tetrapods. Axolotls are aquatic animals, and have adapted to live in the water. Snakehead fish survive in freshwater, The Times reported.
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