Famous ocean advocate Lewis Pugh is well known as a speedo diplomat, human polar bear and world-record-breaking endurance swimmer.
He's the first person to complete a long distance swim in every ocean of the world and swim across the North Pole.
But his biggest pride and achievement is brokering the international negotiations which have resulted in a marine wildlife sanctuary in Antarctica’s Ross Sea.
The Ross Sea is home to hundreds of species of sea life, including seals, whales, and penguins - all threatened by fishing.
After two years of campaigning to world leaders, it was finally declared the globe's largest marine protected area (both on land or sea) in October this year.
Pugh saw the importance of saving the pristine region and describes the beauty of the ecosystem.
It's the most remote place on this earth. It's an amazing place, like the polar garden of Eden.— Lewis Pugh, extreme swimmer and ecological activist
What made me go down there and risk everything was this special place.— Lewis Pugh, extreme swimmer and ecological activist
But swimming in the Ross Sea wasn't easy with the water temperature at minus 1.7 and the air temperature minus 37 degrees.
Ross says the announcement marks a monumental moment in history and serves as an example for others to take a stand for conservation.
@CapeTalk This conversation brings tears and such a lump to my throat! Our earth needed this win and need many more like it. Thank you— Lauren (@lollygreve) November 22, 2016
@CapeTalk Loving your programme with Lewis Pugh. Extraordinary human being!— Maria de Andrade (@AprilSnowGoose) November 22, 2016
Pugh is confident that the majority of nations will adhere to the Ross Sea MPA. @LewisPugh— CapeTalk on 567AM (@CapeTalk) November 22, 2016
CapeTalk hosted a live audience with presenter Pippa Hudson, and they had a many many questions for the swimmer. Watch below.