Now over 50 species of these cold-blooded intruders have colonised the world's tropical seas. Feared by bathers and divers alike, their venom is among the most toxic of any creature. Much about Sea Snakes remains a mystery and numerous questions about them need answering. What made them abandon the land, how often do they need to breath, how often do they eat, how territorial are they, why do they return to land, are they aggressive by nature and what are their secrets to survival?

The search for clues leads us to an extraordinary place that is the Sea-Snake capital of the world - Ashmore Reef. Here 500 miles West of Darwin, we reveal the very private lives of these serpents of the sea.>!!