S1, E3: Whales Manta Rays And Whale Sharks Are All Consumers Of Animal Plankton Or Small Fish Which Are Themselves Huge Consumers Of Vegetable Plankton These Marine Algae Produce Half Of The Oxygen On Earth And Capture 40 Percent Of The Carbon Dioxide The Sea Giants Are Real Allies In Regulating The Earths Climate And Restoring Essential Reef Productivity