Coral Reefs

Many animals like corals release eggs and sperm into the water on just the right nights of the month.

How Lunar Cycles Guide the Spawning of Sea Creatures

Researchers are starting to understand the biological rhythms that sync worms and corals to phases of the moon

A scuba diver encounters fish swimming around a reef in the Maldives.

The Top Eight Ocean Stories of 2022

The biggest saltwater moments of the year included major discoveries that inspired awe

The first juvenile collector urchin (Tripneustes gratilla) raised from a cryopreserved embryo.

A Graduate Student’s Research Could Help Stop the Spread of Invasive Seaweed in Hawai'i

For the first time, using cryopreservation to freeze sea urchin embryos may help restore coral reefs

The elkhorn coral is one of the most endangered corals in the Caribbean and the Florida Keys. In Florida alone, the population is reduced by over 95 percent. A coral breeding project using elkhorn coral gametes collected in Florida and Curaçao hopes to give this species a new lease on life. 

This Moonshot for Coral Breeding Was Successful

But the coral are still in tanks, waiting to be released on reefs

A model of an oarfish

Rare Oarfish Caught on Video on Great Barrier Reef

This is the first record of the species on the eastern seaboard of Australia

Fish like Epinephelides armatus, also known as breaksea cod, tend to be rated as uglier than fish like Holacanthus ciliaris, or queen angelfish.

Ugly Fish Need Love, Too

New research finds that less attractive reef fish are more likely to be threatened

Participants in First Nature Tours help mitigate damages from wildfires in Central Oregon.

Regenerative Tourism Invites Travelers to Get Their Hands Dirty

Vacations that allow tourists to participate in conservation activities, such as habitat restoration, are growing in popularity

When a group of 360 dolphins visited corals located in the Northern Red Sea, reseachers noticed that calves under one year old would watch adults brush themselves against the coral.

Dolphins May Use Coral and Sponges as Skin Care Items

The mammals rub on invertebrates, possibly to contact substances that might work like antibacterial creams

Researchers tested how oxybenzone and sunlight combined harms anemones in a new study. 

Scientists Now Know Why Sunscreen Harms Corals

A new study shows that, when exposed to sunlight, anemones turn a chemical found in sunscreen into a toxin

When corals are stressed, they will expel their algal partner in a process called coral bleaching.

Mass Coral Bleaching Hits Australia's Great Barrier Reef

Unusually warm waters are stressing sensitive corals, causing the fourth major bleaching event in the last seven years

Some chemical compounds used in sunscreens, such as oxybenzone and octinoxate, are facing scrutiny from legislators and environmental advocates. Scientists are looking to the ultraviolet light-blocking compounds produced by marine organisms as potential replacements.

Designing a More Environmentally Friendly Sunscreen

Scientists are sourcing new ultraviolet ray-blocking compounds from algae, seaweed, cyanobacteria and other marine creatures

Last November, a team of scientists and photographers spent 200 hours studying the vast reef during a dive expedition supported by UNESCO.

Good News

Researchers Find a Pristine Coral Reef Off the Coast of Tahiti

With rose-shaped corals as far as the eye can see, it is one of the largest healthy reefs on record

From amazing firsts on Mars to the impacts of climate change on Earth, these science stories stood out as the most important of 2021

The Ten Most Significant Science Stories of 2021

Thrilling discoveries, hurdles in the fight against Covid and advancements in space exploration defined the past year

In the mountains of southwestern Nevada, the dark fossilized remnants of extinct archaeocyath reefs dot the tops of the hills. Millions of years ago, these peaks were at the bottom of the sea.

Fossils From One of the World's First Reefs Can Be Found on Mountains in Nevada

Archaeocyaths were the original reef builders, and one of the best places to see them is in the desert

Healthy reef habitats are usually alive with the diverse sounds of marine life.

Bizarre Fish Songs Raise Hope for Coral Reef Recovery

Audio recordings show a once-dying ecosystem has transformed into a lively soundscape

A growing body of work shows that marine animals are attracted to the sounds of healthy environments.

Playing Recordings of a Healthy Ocean Can Help Restore Marine Ecosystems

Scientists are using a 'fake it til you make it' approach to attract animals to coral reefs and other degraded habitats

Three giant rocks—Tokia, Rebua, and Kamatoa—sit in the ocean south of Makin Island in the Republic of Kiribati.

How Indigenous Stories Helped Scientists Understand the Origin of Three Huge Boulders

Legends spurred researchers to form a theory about Makin Island's distinctively out-of-place rocks

A diver swims over a bleached section of the Great Barrier Reef near Heron Island.

The Planet Has Lost Half of Its Coral Reefs Since 1950

A new study finds dramatic declines in coral reef cover, biodiversity and fish abundance

Environmental scientist Alexandra Ordoñez Alvarez from the University of Queensland collects data in Far Northern Great Barrier Reef on Ashmore Bank.

Scientists Complete the First Map of the World's Coral Reefs

Nearly 100,000 square miles of the organism have been charted in high detail to create a tool for conservationists to help save them

Olive sea snakes are among the largest marine snake species and sometimes make contact with divers.

Venomous Sea Snakes That Charge Divers May Just Be Looking for Love

A new study suggests apparent attacks are actually fleeting cases of mistaken identity

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