Over the past decades, mangroves have been destroyed and ecosystems decimated in the Mekong Delta for the sake of the shrimp industry. Local fishermen are now hoping to revive fish stocks and ensure their shrimp qualifies for organic certification.
One of the largest populations of giant manta rays in the world lives off the northern coast of Peru. Kerstin Forsberg wants to protect them - with the help of the local fishermen.
Large-scale trawling is being blamed for killing at least a thousand dolphins that have washed up on beaches in the United Kingdom and France. Activists are demanding tougher protection - Brexit is complicating matters.
In the US, "Finding Dory" has already become one of the most successful animated films ever. Such movies can fuel demand for home saltwater aquariums. Conservationists say that is not a good thing.
The oceans are a dark mystery. They surround us, and yet they are largely unknown. We once thought they were flat and boring. We now know they are anything but. And there's so much more to discover.
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