Each November cold water upwelling off the south west coast of Victoria creates the perfect conditions for the world's biggest animals - Blue Whales. Blue Whales are endangered after they were hunted nearly to extinction during commercial whaling. Now they're slowly recovering, but they remain extremely mysterious.

In this episode, we chat to Dr Pete Gill, founder of the Blue Whale Study, who has been studying southern Australia's Blue Whales for over 20 years. Find out more at bluewhalestudy.org.

Image: James Maughn