Amazon reef ecosystem: Listening to ocean’s underwater sounds

In the coming months, the findings gathered from surface to seabed will be closely analysed, giving an unprecedented understanding of marine life.

Scientists have been studying the migratory routes of humpback whales and other marine species off the coast of French Guiana in the Atlantic Ocean.

The research involves listening to sounds deep underwater, on a newly discovered reef system.

Al Jazeera’s Nick Clark takes a rare listen in his third report from the region.