Plastic is ubiquitous and a material that many of us take for granted, especially single-use plastics. While plastic offers convenience and versatility, we have to consider that every piece of plastic ever made still exists on the planet. Philippe Cousteau meets with Mark Rodrigue from Parks Victoria at the Marine and Freshwater Discovery Centre, and biologist and filmmaker Sheree Marris, to learn more about the unique ecosystem of southern Australian. Dive in with Philippe and fur seals and more in Port Phillip Bay.