A band of inspired young Australians are deploying a new weapon against a global scourge - the great gobs of plastic polluting our oceans. Europe Correspondent Lisa Millar tells how they're doing it.

Today we go on a nautical voyage down to the mysterious depths of the ocean. Join Dr Rob as he SCOPES out how scientists explore the deepest regions of the ocean, checks out a huge collection of fish and finds out how to map the sea floor.

From humpback whale messengers, to wave energy, wild shark rescues and even ocean acidification, it's all covered on this episode: where the ordinary becomes extraordinary. National Science Week 2020: View page 42 of Resource Book of Ideas for full description and activity on ocean acidification.

From jellyfish research to surfboard tech for ocean monitoring. All that and more in this episode, where the ordinary becomes extraordinary.

Hydro Habitats: Some animals live in trees, others on land but a vast majority of them live in the stuff that covers 70% of our planet's surface. That's right, on this episode of SCOPE we explore the aquatic world of hydro habitats! We head out to Victoria's largest national marine park, we catch up with some dolphins and we learn all about the bizarre breeding habits of coral! Wilson's Prom: Wilsons Promontory Marine National Park is the largest in Victoria and as Dr Steffan Howe and Dan Ierodiaconou from Parks Victoria and Deakin University explain, the remarkable reefs and colourful coral here rival that of the Great Barrier Reef! Dolphin Sanctuary: Pollution can have a devastating effect on our marine ecosystem. But as Marianna Boorman from the Adelaide Dolphin Sanctuary Action Group explains, these effects can be reversed and marine life can return to a previously inhospitable environment. DIY Science - Water Filter: Clean water isn't hard to come by in a country like Australia, but what if we didn't have access to clean water? Well we'd have to use a filter! Join junior scientist Alexi as he tries out several different water filters to find the most efficient way of making dirty water clean! Coral Spawning: Coral reefs are essential to the health of a marine ecosystems. So understanding how they reproduce is vital! Join Dr Christopher Doropoulos from the CSIRO as he walks us through the bizarre breeding habits of coral! Clownfish Conservation: Meet Anita Nedosyko from Flinders University, she's developed a captive breeding program for Clownfish that is helping conserve their populations in the wild! So join Lee in the lab as the ordinary becomes extraordinary under the SCOPE!

We begin our ocean odyssey on the Great Barrier Reef, where the East Australian Current first meets the coast and begins its journey south.

Ride the East Australian Current through the subtropical marine environments of New South Wales with a pod of migrating humpback whales, as we explore how the warm flow sustains and transforms whole ecosystems.

As we reach the end of the East Australian Current, its remaining flow mixes into the Antarctic Circumpolar Current and the Indian Ocean. Our whales finally leave Tasmania's temperate waters on their journey to Antarctica.

You'll find it in your supermarket fridge, on sushi trains, and in fish shops all over Australia. Salmon is Australia's favourite fresh seafood and we consume tens of thousands of tonnes of it a year. This fish is not caught in the wild, it's grown and farmed in the waters around Tasmania and is a booming industry. But there's a lot consumers don't know about the making of farmed salmon. Producing salmon is big business and the industry is reaping big profits with plans to turn it into a billion dollar industry within 15 years. Reputation is important and industry players promote their businesses as being open and transparent. But those assurances are being put to the test with controversial plans by the biggest salmon company, Tassal, to expand into a new area, causing strong divisions in the community. Those community divisions have brought attention and our unwelcome scrutiny.

Is space truly the final frontier? Is there a place even closer that we know less about? The oceans of the Earth are vast and deep and what lies beneath the surface remains largely unchartered territory.

Watch the transformation of the open ocean that occurs every day from dusk and dawn, when billions of animals migrate from the deep to the surface and back again.

We look into marine life in Australia, to find out what plastics escape our household drains & what kind of damage they can do. And the geology of north-western Tasmania reveals similarities to Antarctica.

Pharrell Williams and Darren Criss join Global Citizen's push to get governments, corporations and citizens to address ocean plastic pollution.

Craig Reucassel returns for another season of the series that sparked action across the nation. Craig explores our reliance on single-use plastic items, such as plastic bottles and straws, that damage our waterways and marine life.

Lara explores ocean energy and what it means for Ireland's future. Lara investigates the latest in ocean energy technology and the innovators behind it. Lara discovers the vast wealth of energy sitting just off our shores.

David Day has made over 40 pieces of art - turtles, stingrays, manta rays and fish - from ocean rubbish. Some pieces are purely made out of thongs, others made out of mixed marine debris. National Science Week 2020: View discussion question on page 36 of Resource Book of Ideas based on marine debris.