can geckos swim underwater
They can all swim, but none of them can breathe underwater. All lizards are reptiles, but some animals that look lizard-like (for example, newts) are actually amphibians. If an animal lives mainly in or around water, it is probably an amphibian, if it lives mainly on land, it is probably a reptile. Reptiles cannot breathe underwater, though many can swim. Amphibians also need to surface for air, but they can usually spend long periods of time under water without needing to breathe. Another good way to tell the difference between reptiles/amphibians is their skin.