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Bikini Atoll, formed over millions of years around an island in the Pacific Ocean about halfway between Papua New Guinea and Hawaii, has been subjected to horrific human-caused disturbances. Between 1946 and 1958, the...
Blog entry MORE STORIES Blog entry MORE AUDIO / VIDEO
Welcome to Citizens of the Sea , a new blog series where ocean life comes to...
Slideshow MORE STORIES Slideshow MORE AUDIO / VIDEO
From parrotfish that cover themselves in a blanket of their own mucus to tiny...
Blog entry MORE STORIES Blog entry MORE AUDIO / VIDEO
Stare at a tide pool and you will often see a crust of pink coating the bottom...

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Compare the healthy coral on the left with the bleached coral on the right. Increased water temperatures caused the bleached coral to lose the microscopic algae that give the coral color and provide it with food. Corals can...
The Oculina deep-sea coral reef at top has not been disturbed by humans—but...
What are corals? Corals themselves are animals. But tropical reef-building...

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It may be the last place you’d expect to find corals—up to 6,000 m (20,000 ft) below the ocean’s surface, where the water is...
Unlike the shallow tropical coral reef pictured on the top, the deep-sea Oculina reef at bottom does not require sunlight. Learn more in the article " Coral Gardens of the Deep Sea ."
A coral ( Montastraea faveolata ) has just spawned. Each of the hundreds of polyps living in the colony releases a small pink bundle of sperm and eggs. Read more about coral spawing and watch a...
By Lindsay Aylesworth, Project Seahorse The day I stepped into my wetsuit, donned my mask, and embarked on my first scuba dive was the day I decided to be a marine biologist. Little did I know that...
Scientists on the tiny island of Moorea, in the Pacific, are gathering one of every life form large enough to pick up with tweezers. They're on a quest to build a detailed catalog of the entire...
Imagine you’re an alien seeing Planet Earth for the first time. What do you see from your spacecraft? A blue planet with over 70% of its surface covered by ocean. From space it’s obvious how...
A thicket of white stony coral ( Lophelia pertusa ) shelters a squat lobster (Eumunida picta). This is the typical shape of this widespread species of deep-sea coral. See more pictures of coral in...
Sit down with two veteran marine scientists, Dr. Nancy Knowlton and Dr. Jeremy Jackson, who fell in love with each other and the reefs of the Caribbean 40 years ago. Those reefs are now gone due to...
A marine scientist performs a genetic analysis on a sample of deep-sea coral to find out if it is a known species or one new to science. Find out how ocean scientists study deep-sea corals in our...
Coral reefs are bustling cities of marine life, until rising ocean temperatures turn them into ghost towns. Can reefs spring back from devastating bleaching events? In this episode of the Podcast of...
Sometimes called the rainforests of the sea, coral reefs are incredibly diverse and complicated systems. Because of this complexity, it can be a challenge to manage and protect reefs—and sometimes...
This colorful coral lives in Australia's Great Barrier Reef. On the whole, this coral reef is the largest single structure built by living organisms and can be seen from space! Although more than one...
by Laura Brodbeck A special type of marine protected area (MPA) called a “no-take zone” bans the removal of marine life from designated areas. At first glance, they seem like a hard sell to fishermen...
On a healthy coral reef, fish (as well as many other organisms) thrive. Not only are reefs beautiful, but they are also critical to ocean health and human livelihoods.
“ This moray eel was resting among some hard coral and was mesmerized by my dive lights, making it a very cooperative subject. The moray eel rhythmically opens and closes its mouth to move water...
In November 2012, Australia began protecting a huge swath of its ocean from overfishing and oil exploration, creating the largest network of marine reserves in the world at a grand total of 1.2...
Nestled among the beautiful coral reefs of Papua New Guinea (PNG) is a place that could provide the key to our understanding of one of the biggest threats to coral reef survival: Ocean Acidification...
by Amanda Feuerstein On the east coast of Mexico’s Baja California Peninsula lies a small marine protected area that represents one of the most impressive successes in ocean conservation. Cabo Pulmo...
Papahānaumokuākea, a chain of islands northwest of the main Hawaiian archipelago, is home to vibrant coral reefs with scores of fish species. It was designated a Marine World Heritage Site in August...
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