Remain in the water for up to 2 hours on a single breath. If you are a sea snake that is.
It was a delight to discover a BBC video of these elegant creatures gliding through the water.
In order to move in a marine environment, sea snakes have adapted their streamlined shape, narrowing themselves vertically like thin blades. Their lungs extend to almost the full length of their bodies but unlike fish, they don’t have gills and must surface regularly to breathe.