Marine, air breathing reptiles with a potent neurotoxic and myotoxic venom responsible for many deaths world-wide - although there are no documented deaths in Australia. They are usually found close to shore, or on coral reefs. They are easily distinguished from land snakes by their wide, flattened tail which is used for swimming, and from eels by their lack of gills. Fortunately, despite having a potent venom, when they bite they inject venom in only some 20% of cases.... sea snakes