World's deepest blue hole found in South China Sea

Questions remain about how the mysterious hole formed and what, if any, life it harbors

• Jul 28, 2016

"Godzilla" El Nino is over; is La Nina on its way?

After 12 straight record hot months worldwide, a new trend may be taking hold

• Jun 9, 2016

More acidic seawater eating away at Florida Keys reef

A new study reveals that slightly more acidic seawater is taking a toll on Florida reef sooner than expected

• May 3, 2016

Great Barrier Reef coral bleaching hits "extreme level"

Aerial survey of Australia's Great Barrier Reef confirms vast extent of the unprecedented bleaching

• Mar 28, 2016

Divers work to clean up failed Florida reef project from the '70s

Up to two million tires, bundled by metal clips, were dumped to create an artificial reef; but now they're damaging it

• Dec 16, 2015

Scientists tinker with evolution to save coral reefs

Researchers are creating lab-grown "super coral" that can withstand rising ocean temperatures and acidification

• Nov 5, 2015

​Lionfish: From malicious to delicious

It's an invasive species spreading across the oceans, but some chefs have found a new way to tackle the venomous lionfish: putting it on the menu

• Oct 11, 2015

Coral bleaching crisis spreads worldwide

Triggered by global warming and El Nino, record hot ocean water is causing fragile coral to go white and often die

• Oct 8, 2015

Great Barrier Reef may have a colorful rival

Diving deep beneath Australia's southeast coast reveals a marine park's natural wonders

• Aug 26, 2015

Warm temperatures threaten corals in U.S. waters

Abnormally warm seas are creating conditions that could kill coral in the Pacific and western Atlantic oceans

• Jul 7, 2015

Scientists put GoPro on sea turtle - and it's awesome

This amazing video gives a turtle's eye view of the beautiful, breathtaking and severely threatened Great Barrier Reef

• Jul 2, 2015

Google brings the world's coral reefs to your screen

Google Street View imagery from 40 underwater locations includes virtual dives off Bali, the Bahamas and the Great Barrier Reef

• Jun 9, 2015

Coral bleaching hits Indian Ocean reefs

Finding proof of bleaching raises concerns that it could spread globally this year

• May 19, 2015
• 17 photos

Indian Ocean reefs hit by coral bleaching

The condition has already hit corals in the Pacific and has the potential to spread globally due to warming seas

• May 19, 2015

Black band disease killing coral in Hawaii

The outbreak -- the first in the state -- is affecting as many as half the coral reefs around Kauai

• Apr 30, 2015

Live streaming from the bottom of the Caribbean Sea

Watch: Miles below the surface, a remote controlled sub is sending live video of its mission, complete with jellyfish cameos

• Apr 13, 2015

Nature lovers' stake in Cuba's terror designation

Cuba and U.S. are separated by only 90 miles of water -- a boundary that sea life and oil spills completely ignore

• Apr 10, 2015

Britain creates world's largest marine reserve

The area is more than three times the size of the United Kingdom and will protect more than 1,200 marine species

• Mar 19, 2015