September 10, 2018 — The bluefin tuna is one of the biggest, fastest fishes in the ocean. Its streamlined body can sprint at up to 45 miles per hour in pursuit of its prey. Reaching some 500 pounds, this giant once dominated the Atlantic, Pacific and Indian oceans. But humans have hunted the bluefin for thousands of years. In the last century stocks have been decimated. The Pacific population is now just 2.6 percent of its original size.

Many other species that live in the high seas—the two thirds of Earth’s oceans that lie beyond national waters—are suffering a similar fate. There is no universal law protecting biodiversity. “This is a massive gap, a literal hole in the middle of the ocean,” says Lance Morgan, president of the Marine Conservation Institute, a U.S. nonprofit focused on ocean protection.

That is about to change. The United Nations is pushing to protect marine life on the high seas with a legally binding treaty by 2020. Delegates from 193 nations are working on it at U.N. headquarters in New York City, through September 17. Yet tension is already in the air. Russia, for example, is vocalizing its opposition to global governance of international waters, a position that could delay or even scuttle the process. And certain nations, from Africa and South America in particular, have made it clear any benefits reaped from international waters should be shared with countries worldwide.

The high seas are home to some of the planet’s most charismatic creatures, such as dolphins, sharks, whales and turtles. They contain valuable fisheries and support ecosystems found nowhere else. Yet until last year there was not a single, large marine protected area in international waters. Today, just 1 percent percent of the high seas is off-limits to industry.

Mounting pressure for protection is stemming in part from a new wave of exploitation about to hit the high seas. The International Seabed Authority (ISA) has granted licenses to 29 contractors representing 19 countries—from Japan and the U.K. to Kiribati—to explore for minerals at ecologically important sites. These include the Clarion-Clipperton Fracture Zone—a region of seamounts in the central Pacific—and the Lost City, a hydrothermal field in the Atlantic scientists say could hold clues to the evolution of life on Earth. Meanwhile chemical manufacturers are scouring the deep sea for organisms whose genomes could lead to new cosmetics, foods or pharmaceuticals.

Read the full story at Scientific American