If I want to observe a sea snake, I'd have to travel to the other side of the world to the tropical Pacific , Indian Ocean or Southeast Asia . There are about fifty species of true sea snakes and five species of kraits . The biggest difference between the two is that kraits return to the land to lay their eggs. A sea snake can live its whole life without ever touching terra firma. Its eggs develop and grow inside the mother.
Scientists believe sea snakes descended from a single family of Australian land snakes.
Both kraits and sea snakes have adapted their bodies to marine life. Their tails are flattened for swimming. They have glands in their mouths that remove and excrete salt from the seawater that they happen to swallow. Sea snakes can also absorb oxygen from the water through their skin and stay submerged for about two hours if necessary. Some have generalized diets and others only feed on specific prey.