Madagascar

S1 E5: Robson travels to the world's oldest island, on a quest to catch the most fearsome, ferocious and skilled aquatic hunters on the planet. Arriving on the tiny tropical island of Sakatia his first target is Jobfish, a ruthless reef predator with powerful jaws. He then teams up with a local fisherman to spear a master of camouflage, the Octopus. Heading out to deeper water he does battle with the imm