Destination: Colombia

Expedition: Colombian shark scientist Diego Cardenosa has discovered not one but four species of critically endangered hammerhead sharks in Sanquianga National Park and he is on a mission to save them. This park is the only known region in the world where all four of these small hammerhead species are found together in large numbers, but time is running out. Overfishing, habitat destruction and poor scientific information have inhibited their protection so far, but Cardenosa and his team of scientists and local fisherman are bound and determined to reverse the tide of extinction for these remarkable little sharks.