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Roughly 250 beaches in northeastern Brazil are affected by the mysterious oil spill. Shutterstock / Joa Souza

By Emily Petsko

Update, Nov. 7: Brazilian authorities named a Greek-flagged vessel as the culprit of the oil spill, but backtracked on Wednesday when they announced that four other suspected tankers were also being investigated. Three of the crude-carrying vessels are owned by Greek companies, and the fourth suspect is owned by a Belgian company, according to Reuters.

Update, Nov. 4: Brazilian and international media are now reporting that fragments of oil have reached the Abrolhos Marine National Park. This story is still developing.

One by one, the golden beaches in northeastern Brazil have begun to turn black. Thick clumps of oil have been washing ashore since late August, killing marine animals, threatening the livelihoods of coastal communities and tainting 2,500 kilometers of coastline spanning nine Brazilian states. Once-pristine beaches now look like something resembling a Rorschach inkblot test. And the complex root systems of carbon sink mangrove forests have become polluted mazes.

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A woman carries fish in Nauta, Peru. Oceana / Shutterstock / Christian Vinces

By Emily Petsko

For many, the end of October evokes images of falling leaves or Halloween's ghosts and ghouls. But those of us focused on oceans also know October as National Seafood Month.

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EcoWatch Daily Newsletter

Nigel Marple / Greenpeace

By Amy McDermott

Canned tuna is a staple in my pantry, and probably in yours. Americans and Europeans buy more of the squat little cans than anyone else, importing almost a million tons in 2018. Supermarkets carry at least 20 brands.

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Whale Shark. NOAA

By Joshua Learn

Sharks, rays and chimaeras are some of the most threatened fish in the world. More than 50 percent of species in the Arabian Sea are at elevated risk of extinction due to coastal development, overfishing, pollution and habitat destruction. According to an expansive new study, spanning more than a dozen countries, species like sawfish are particularly hard hit with extinction or local extirpation.

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Pexels

By Amy McDermott

Last week, the White House released the Fourth National Climate Assessment, a dire warning on climate change risks and impacts across the U.S. The report does not mince words. In 29 chapters and five appendices, it outlines grave threats to life, livelihoods, national security and the U.S. economy, caused by sea level rise, extreme temperatures, severe storms, fires, flooding and other climatic changes.

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Magnus Larsson / iStock / Getty Images Plus

By Rachel Kaufman

Humans produce hundreds of millions of tons of plastic every year. As much as 12.7 million metric tons of it ends up in the ocean, where it can transport pathogens, or be mistaken for food by hungry animals.

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To predict the nutrient content of fish, a new study turned to shared evolutionary history. Oceana / Eduardo Sorensen

By Amy McDermott

Eels and anchovies don't look or act much alike. One is sinuous and shy, the other a bright flash of silver in a school of thousands. Yet the two fish are cousins, both loaded with zinc.

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Southern Resident killer whale. Rachael Griffin / iStock / Getty Images

By Joshua Learn

Whether southern resident killer whales, North Atlantic right whales or Maui's dolphins, a handful of cetacean species are facing the prospect of a slow-motion extinction they can't breed their way out of.

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Chile's once-common hake have been decimated by waves of legal and illegal fishing. Claudia Pool / Oceana

By Allison Guy

When Hugo Arancibia Farías was a child, his mother, like most mothers in central Chile, visited the weekly market to buy common hake, a white-fleshed relative of cod. She usually served it fried, Arancibia recalled with relish. "It was very cheap," he said, "and very popular."

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Chile's small-scale fishers are squeezed, but a renewed interest in native foods offers hope. Claudio Almarza / Oceana

By Allison Guy

When Carlos Castro was young, he didn't plan on following his dad and granddad into fishing. Like a lot of teenagers in the 1970s, Castro dreamt of kung fu. Bruce Lee was more his style than the family business.

Castro swam laps to shape up back then, dodging boats in the bracingly cold bay of Valparaiso, a port city in central Chile. Forty years later, he still plies those waters, driving one of the boats he used to swim past. Castro, a youthful 56 in white trainers and Nike gear, became a fisherman after all.

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Russian and U.S. students carry bug spray for the mosquitoes, bear spray for the grizzlies and notebooks for the salmon science, while studying in Alaska's backcountry. John Simeone on behalf of WWF

By Amy McDermott

At the height of the Alaskan summer, a troupe of students hiked up the middle of a shallow creek. Undergraduates and grads from the University of Washington, the University of Alaska Fairbanks and Kamchatka State Technical University in eastern Russia carried handheld clickers to count the multitudes of salmon thrashing upstream to spawn. Some of the students spoke English, others Russian, but they all came to see salmon: fish that their two countries share.

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