The Expedition Begins

By Ken Kostel | July 31, 2019
Paper nautilus

On the second day of their 15-day expedition to explore the ocean twilight zone aboard NOAA Ship Henry B. Bigelow, scientists from the Woods Hole Oceanographic Institution and National Marine Fisheries deployed Deep-See in the Atlantic Ocean. That first deployment was in relatively shallow water to test systems for a deeper deployment the next day,…

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New York Times: The Creepy Anglerfish Comes to Light

By Ken Kostel | July 30, 2019

Increasingly, these ghoulish and improbable denizens of the abyss are being captured on video, revealing an array of surprising behaviors.

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Once More Into the Twilight Zone

By Ken Kostel | July 28, 2019
Deep-See deployment

On July 25, scientists embarked on the 2019 Ocean Twilight Zone expedition aboard NOAA Ship  Henry B. Bigelow. A team made up of WHOI and NOAA Fisheries researchers departed Newport, R.I., Thursday morning and headed south towards the edge of the continental shelf. This will be the first full scientific mission into the ocean twilight…

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Mesobot Dives into the Twilight Zone for the First Time

By Kathryn Baltes | July 3, 2019
Mesobot using red light in a test tank

The newly developed deep sea robot, Mesobot, dove down to 300m for the first time last week during a successful test and evaluation cruise off Monterey Bay. Mesobot is designed to let scientists observe the twilight zone by autonomously tracking individual animals for hours or even days without disturbing the environment or disrupting their behavior.

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Discovering the Ocean Twilight Zone with Joel Llopiz

By Kathryn Baltes | June 3, 2019
Photo of bristlemouth

Most life forms in the twilight zone are tiny—a few inches or less—but even the smallest twilight zone inhabitants are powerful through sheer number. Joel Llopiz, Associate Scientist at the Woods Hole Oceanographic Institution, is part of the Ocean Twilight Zone (OTZ) project. The project is embarking on a bold new journey to explore one…

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Entering the Ocean Twilight Zone with Heidi Sosik

By Kathryn Baltes | June 3, 2019
Heidi Sosik and Paul Caiger in a manned submersible.

It is hard to describe what it’s like to physically travel down to the twilight zone. In addition to extraordinary bioluminescence, Heidi Sosik, senior scientist at Woods Hole Oceanographic Institution and Ocean Twilight Zone (OTZ) project lead, was able to observe beautiful jellies and small fishes like bristlemouths, hatchetfish, and lanternfish, all in their natural…

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Fish with Flashlights

By Kathryn Baltes | May 30, 2019
Sloan viper fish

Down in the dark and shadowy mesopelagic layer of the ocean, countless species—bristlemouths, lanternfishes, jellies, and others—have a natural ability to generate their own light through chemical reactions. Most twilight zone animals produce blue light—the color that penetrates the farthest through seawater—but some also produce flashes of red, yellow, and green. Collectively, the lights form…

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Bringing Light into Darkness

By Kathryn Baltes | May 24, 2019
Floating jelly

Oceanographers studying creatures in the ocean twilight zone are facing an optical dilemma. They need to observe the fish in order to study them, but at ocean depths of 200 meters and beyond, there’s very little natural light trickling down from the surface. This means that submersibles developed to image and track these animals need to be…

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New Cooperative Institute to Boost Twilight Zone Exploration

By Ken Kostel | May 10, 2019

On May 6, WHOI announced it would be joining a $94 million consortium led by the University of Rhode Island Graduate School of Oceanography to support ocean exploration, responsible resource management, improved scientific understanding of the deep sea and strengthen the nation’s Blue Economy. The goal of the new Ocean Exploration Cooperative Institute, which includes…

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The Ocean’s Twilight Zone May Be the Key to Feeding and Protecting Life on Earth

By Ken Kostel | May 2, 2019

You may think of the twilight zone as a frequently-revived TV sci-fi series, but it also refers to that deep, dark, mid layer of the ocean between 200 and 1000 meters, a part of the ocean that has been largely ignored—until now.

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In the News

It’s ‘the last frontier on Earth that’s truly not well understood,’ and scientists are about to explore it
The Boston Globe

Why Great White Sharks Hang Out in Warm Whirlpools
National Geographic News

Into the Darkness
Cape Cod Times

Scientists Get Major Gift to Study the Twilight Zone

With $35M grant, WHOI scientists will dive to the edge of ocean's light
Cape Cod Times

Woods Hole Oceanographic Institution gets $35m to explore deep reaches
Boston Globe

Deep-sea project wins prestigious funding at Vancouver TED conference
The Globe & Mail

The ocean’s ‘twighlight zone’ faces fishing threat
News Deeply

Study finds high levels of microplastics in mesopelagic fish

The deep seas are alive with light
New York Times

What happens in the sea during a solar eclipse?
Deep Sea News

In disposable mucus houses, these zooplankton filter the oceans
New York Times

The race to fish the larder living in the ‘twilight zone’

Unraveling the mystery of the ocean’s twilight zone

Mysterious ocean blobs aren’t so mysterious
The Atlantic

Fishing the deep. Is it time to start fishing the deep sea? Some scientists are urging caution.
Hakai magazine

Dark region of ocean may shed light on climate change and other issues
New York Times

An ocean mystery in the trillions
New York Times

Fish in the ocean cast new light on ocean ecosystems
The Conversation