Two women are working to save the coral reef from the invasive lionfish, using it as a sustainable teaching tool and cooking it into everything from tacos to fish and chips.

The world's largest invertebrate remained hidden from humanity until a tantalising glimpse 100 years ago. But it would be decades before we come face to face with the colossal squid.

Once pushed to the brink of extinction by overfishing, bluefin tuna has experienced a spectacular rebound in recent years. But can it survive the onslaught of climate change?

Icebergs produce some of the loudest natural noises in the oceans. Can we learn anything about their birth, life and death by listening in?

From erecting seawalls to selling citizenship, vulnerable small islands are taking sometimes drastic measures to protect themselves from rising seas, storms and economic devastation.

When scientists peered beneath one of Antarctica's floating ice shelves, they were surprised to find an upside-down landscape of peaks, valleys and plateaus.

Facing erasure due to climate change, the Pacific Island nation of Tuvalu is digitally backing up everything from its houses to its trees as it endeavors to save whatever it can.

Could lessons from the ancient past help us protect the world's oceans?