Two of Earth's most amazing animals go head to head in our latest debate. We're asking you to decide which animal reigns supreme. Is it the eight-armed, three hearted, shape-shifting octopus? Or the speed swimming, echo-locating, super-jumping dolphin? Listen along as Marc argues for #TeamOctopus and Sanden fights for #TeamDolphin. We'll learn amazing facts about both sides along the way. Plus an aquatic Mystery Sound, some deep-sea stand up comedy and a Moment of Um answering why flamingos are pink... featuring Flora Lichtman from Gimlet Media's Every Little Thing.