Corals

Orange and red deep-sea corals.

Deep-Sea Corals: NOAA Education Plans & Activities

Explore deep-sea corals in "Corals in Cold Water?" an Ocean Portal feature co-developed by the National Oceanic and Atmospheric Administration's Office of Habitat Conservation's Habitat Protection Division , the Coral Reef Conservation Program and...

Reef Sharks Repelled by People

Large numbers of grey reef sharks were observed at Jarvis Island, an uninhabited Pacific island, during the 2010 Pacific RAMP expedition of the NOAA Ship Hi'ialakai . Credit: NOAA Reef sharks rarely get any...

World Oceans Day 2012 - Live Webcast

On World Oceans Day - June 8th, 2012 - the Living Oceans Foundation hosted a live web-based conversation between Sylvia Earle at the Smithsonian's National Museum of Natural History and a team of scientists...
A graph compares the crustacean biodiversity of coral reefs around the world.

Hotspot of Biodiversity

This graph compares the crustacean biodiversity of coral reefs in Bali with two sites on the Great Barrier Reef (Heron and Lizard), Ningaloo Reef (NW Australia), Moorea, French Polynesia, Hawaii and the Line Islands...
Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.

Making Science Sing: The Longest Time (Coral Triangle Edition)

Corals, sponges and seaweeds cover most of the surface of many coral reefs . Credit: Wolcott Henry How do you make science sing? Just ask a couple of female scientists to sing about their...
Intense volcanic CO2 vents in Ili Ili Bua Bua, Normanby Island, Papua New Guinea.

Will Coral Reefs Survive Acidification?

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...
Where the pH is the lowest, corals can no longer grow - sand, rubble and seagrasses replace the reef.

Sneak Peek: Future of Coral Reefs in an Acidifying Ocean

Scientists don’t often get the opportunity to travel through time. But nestled among the beautiful coral reefs of Papua New Guinea (PNG) is a place that provides a glimpse today of what could be...
Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.

Corals and Coral Reefs

Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one quarter of all ocean species depending on reefs for food and shelter. This is a remarkable statistic...
Colorful corals are disappearing in the Great Barrier Reef.

The Great Barrier Reef – Going, Going, Gone???

Video of Storms, Starfish Wiped out Half of Great Barrier Reef Coral Dr. Nancy Knowlton, Sant Chair of Marine Science and Editor-in-Chief of the Ocean Portal, went on PBS NewsHour to talk about Great...

Where did Half of the Great Barrier Reef's Coral Go?

In the past 30 years, the Great Barrier Reef -- Australia's iconic natural wonder -- has lost half of its coral to a combination of forces. Dr. Nancy Knowlton, Sant Chair of Marine Science...

Ocean Acidification Excites Boring Sponges

This orange boring sponge ( Cliona varians ) overgrows several coral species at Panama's Smithsonian Tropical Studies Institute. Credit: Amber Stubler Boring sponges get a bad rap. Their own name betrays them, announcing to...
Nuclear bomb in Bikini Atoll

Naturally Resilient

Coral Reefs Can Recover From Disasters. How Can We Save Them From Us? by Michael Webster, Coral Reef Alliance In 1946, the US military tested nuclear bombs on a coral reef in the Pacific,...

Helpful Herbivores

Convict surgeonfish are the roaming sheep of the reef but, instead of noshing on grass, they feed on algae. Credit: Michael Webster When snorkeling in the Kahekili Herbivore Fisheries Management Area (KHFMA) in West...

Coralline Algae: The Unsung Architects of Coral Reefs

Many species of pink coralline algae, which cements coral reefs together, cover a reef surface in the Southern Line Islands. Credit: Maggie D. Johnson, Scripps Institution of Oceanography Stare at a tide pool and...
A shell placed in seawater with increased acidity slowly dissolves over 45 days.

Ocean Acidification

Ocean acidification is sometimes called “climate change’s equally evil twin,” and for good reason: it's a significant and harmful consequence of excess carbon dioxide in the atmosphere that we don't see or feel because...
Sunset over a fishing net.

Success Stories in Ocean Conservation

It is easy to feel hopeless when reading the news coverage of ocean conservation. Between climate change , acidification , pollution and overfishing, it often feels like the ocean and its biodiversity, which we...
Pink crustose algae covers the surface of a rock.

Microbes Help Corals Pick a Home and Settle Down

Like pink paint, crustose coralline algae covers the surface of the rock in a thin layer. This hard surface is a preferred home for the larvae of coral and other invertebrates (such as abalone)...
The coastline of American Samoa National Marine Sanctuary

The Reefs of American Samoa: A Story of Hope

American Samoa National Marine Sanctuary comprises a fringing coral reef ecosystem nestled within an eroded volcanic crater on the island of Tutuila, American Samoa. Credit: Wendy Cover Sometimes called the rainforests of the sea,...