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Alvin collects a sample of Lophelia pertusa from an extensive mound of both dead and live coral.

Scientists discovered 85 miles of deep-sea coral reef hidden off the US East Coast — here’s what it looks like

Scientists on a recent expedition discovered a previously unseen coral reef hidden off the US East Coast. Earlier research pointed to the existence of the reef, but it had never been seen firsthand.
Some of the corals here are already bleaching, losing their color, which is a sign that they're being stressed by heat or acidity.

Up to 50% of the world’s coral has died, but scientists are figuring out how to regrow reefs — here’s what the process looks like

Reefs cover less than 1% of the ocean floor, yet 25% of fish species spend some part of their lives in them, making corals essential to ocean health. Estimates of the overall economic value of reefs suggest they contribute between $30 billion and more than $375 billion to the world economy annually.

Here’s why certain sunscreens are so dangerous for coral that Hawaii plans to ban them — and what you should use instead

Hawaii's coral reefs are worth $33.57 billion, according to a study. Hawaiians hope to protect all that value by banning the sale of sunscreens containing the chemicals oxybenzone and octinoxate, which can kill coral.

Hawaii is about to ban some of the most popular sunscreens because they could be killing off coral reefs

Hawaii is about to become the first US state to ban the chemicals oxybenzone and octinoxate in sunscreens, because they can bleach and kill corals and mess with their reproductive abilities.

Coral reefs provide crucial protection for coastal cities — without them, flood damage could double, a new study finds

Reefs help buffer against storm surge and waves that would otherwise damage coasts. Without living coral reefs, flooding damage around the world would double, a cost increase of $4 billion annually. Flooding could quadruple if the loss of reefs is combined with sea-level rise.

The Great Barrier Reef is one of the most spectacular places on the planet — here’s what it looks like as it dies off

The Great Barrier Reef is one of the most biodiverse places in the entire world, worth billions of dollars. But it's in real danger of being killed off. Burning fossil fuels is cranking up the heat, warming ocean waters faster than reefs can adapt. It's also causing seas to become more acidic.

One of the best nature documentaries of all time returns tonight

The show documents a journey to try and discover where whale sharks give birth and shows how orcas use their powerful tails to kill herring with shockwaves.
Some of the corals here are already bleaching, losing their color, which is a sign that they're being stressed by heat or acidity.

Half of the Great Barrier Reef has died since 2016 — here’s what happens if all coral reefs on Earth die off

Without coral reefs, there could be a rippling ecosystem collapse in the oceans, with devastating effects on the planet.

The world’s oceans are in trouble

The World Wildlife Fund released some depressing news about the health of the world's oceans.