The Coral Triangle, at the confluence of the Indian and Pacific Oceans, is considered the mother of reefs; leading researchers are examining the peculiarities of the Coral Triangle and trying to map out its threatened situation.

The Coral Triangle is the major junction of three great oceans, so it's a great place to track and study migrating marine mammals.

Dr Lawrence Blair revisits the region's whale hunters of Lamalera and crocodile people of Weta, examining their relationship with the marine richness that surrounds them.