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Tuna auctions are a tourist spectacle in Tokyo. Outside the city's most famous fish market, long queues of visitors hoping for a glimpse of the action begin to form at 5 a.m. The attraction is so popular that last October the Tsukiji fish market, in operation since 1935, moved out from the city center to the district of Toyosu to cope with the crowds.

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Rebecca Albright in the California Academy of Science's darkroom where they are working on coral spawning and restoration efforts. Tara Lohan

By Tara Lohan

Visitors walk slowly through a room of dimmed lights and glowing tanks that bring the mysteries of the sea into plain view. The Steinhart Aquarium at the California Academy of Sciences in San Francisco is home to 900 different species — everything from brightly colored reef fish to prickly sea urchins, even an albino alligator named Claude.

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EcoWatch Daily Newsletter

Dragging for catch has led to overfishing in the Gulf of Maine, where fishing with rod and reel is rare. Carl D. Walsh / Portland Press Herald via Getty Images

Scientists continue to uncover more ways climate change poses a threat to our health, such as the spread of tropical diseases northward and the loss of crucial nutrients in crops. Now, researchers at Harvard have added another risk to that list: increased neurotoxins in seafood.

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Implementing new policies could improve transparency and sustainability in North Pacific fisheries. The Pew Charitable Trusts

By Grantly Galland

The North Pacific Fisheries Commission (NPFC) works to ensure that high-seas fishing for Pacific chub mackerel, Pacific saury, two squid species and other stocks across the north Pacific Ocean is legal, transparent and sustainable. The Pew Charitable Trusts shares those goals and will for the first time attend the commission's annual meeting, July 11-18 in Tokyo, as a formal observer.

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Jag_cz / iStock / Getty Images Plus

More than a thousand sharks and rays have become entangled in jettisoned fishing gear and plastic debris, a new study has found. The researchers behind the study warn that the plastic trapping the sharks and rays may cause starvation and suffocation.

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A sei whale, considered endangered by the IUCN; sei are one of three species that will be hunted commercially in Japan starting today. Gerard Soury / Getty Images

Commercial whaling ships set sail from Japan Monday for the first time in more than 30 years, The Guardian reported.

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A healthy coral reef at Swains Island, American Samoa. NOAA / NMFS / PIFSC / CRED, Oceanography Team / CC BY 2.0

By Cody Clements

Coral reefs are home to so many species that they often are called "the rainforests of the seas." Today they face a daunting range of threats, including ocean warming and acidification, overfishing and pollution. Worldwide, more than one-third of all coral species are at risk of extinction.

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Grey reef sharks. Joe Boyd / CC BY-SA 2.0

By David Shiffman

How can we better protect sharks and rays from overfishing?

These related species — which, along with chimaeras, are known collectively as chondrichthyans — include some of the most threatened marine fishes in the world. Sharks and rays face a variety of threats depending on where they live and swim, but the biggest risk comes from overfishing, which takes a noticeable toll on these slow-growing, slow-to-reproduce animals. As a result, nearly 1 in 4 species of chondricthyan fishes is estimated to be, or assessed as, threatened, according to the IUCN Red List.

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Bottlenose dolphins playing in the Pacific Ocean near New Zealand. georgeclerk / E+ / Getty Images

By Sarah Chasis

June 8 is World Oceans Day, dedicated to celebrating our beautiful, mysterious, and life-giving oceans.

As our oceans make up more than 70 percent of the earth's surface, their health drives the future of our planet. Oceans give us every other breath we take, provide a critical source of protein and a way of life for billions of people, contribute trillions of dollars to the world economy, and are home to 50 percent to 80 percent of this planet's life.

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Block Island Kelp / Catherine Puckett

By Marlene Cimons

Catherine Puckett needs to be close to the ocean. "I just can't be away from it," she said. "It means everything to me." She has to see it and smell it and hear the bells that ring from buoys offshore when a heavy sea rolls in from the east. When she is waist-deep in water, ankle-deep in mud, salt marsh on one side and water on the other, there's only one way she can describe it. "It's magical," she said. She even wades in during the coldest days of winter, often breaking through ice to get there. "I think to myself: 'why doesn't everybody do this?'" she said.

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Blue fin tuna jumping to catch flying fishes. bbevren / iStock / Getty Images Plus

Bluefin tuna made the news this week when a 612-pound specimen of the fascinating but vulnerable fish sold for a record $3.1 million at a New Year's auction at Tokyo's Toyosu fish market Saturday. The purchaser was Japanese sushi chain owner and self-proclaimed "Tuna King" Kiyoshi Kimura.

"The tuna looks so tasty because it's fat and (looks) very fresh. It is a good tuna. But I think I did too much," Kimura said, as CNN reported.

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