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The Curasub departs for a deep sea dive, up to 1,000 feet off the island of Curaçao, where this sub is located. Smithsonian's Deep Sea Observation Project (DROP) is exploring these waters and using...
When you think of African animals, what do you think of? Probably the “Big Five:” lions, elephants, leopards, buffalo and rhinos. But Africa also has an incredible amount of marine diversity in the...
Copepods are aquatic crustaceans found in every marine habitat, from surface waters to the deep sea. With over 13,000 described species, they are among the most abundant of all multicellular animals...
Have you ever seen a creature so unusual? This fish (22 cm long) is called a sea toad and studying them requires luck and the opportunity to descend into the deep waters where they live. Last week Dr...
Of all of the species Haeckel described, he is most famous for his illustrations of radiolarians. Planktonic, unicellular marine eukaryotes, radiolarians are found in all of the world’s oceans. The...
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...
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...
Last week, the United Nations’ World Heritage Convention went blue. Two of the largest and healthiest marine protected areas on our planet—the Phoenix Islands Protected Area in Kiribati and...
Dip your head below the water's surface in a mangrove forest and an entirely new ecosystem is revealed. The twisting mangrove roots, some of which don’t make it to the seafloor, support a great...
Tropical coral reefs—found in warm, clear, shallow waters—support a rich diversity of marine life, such as these sea bass in the Red Sea. Learn more in the Ocean Portal's Coral Reefs section .
Nudibranchs are mollusks that have evolved from shelled ancestors. Like the reddish-orange Coryphella verrucosa shown here, they're often noted for their vibrant colors and striking forms. View other...
Census of Marine Life researchers discovered this unusual transparent sea cucumber ( Enypniastes sp.) in the Gulf of Mexico at 2,750 meters depth. It creeps forward on its tentacles pretty slowly, at...
Climate and sea changes in the Southern Ocean create conditions that favor the growth of salps over krill , the latter of which are a vital food source for seals, whales, and penguins. Salps are...
How many animals swim in the sea? It's not easy to count them all. To get a feel for the ocean's diversity, scientists, such as those involved in the Census of Marine Life , sail out on research...
Cashes Ledge is a wild, special place in the heart of the Gulf of Maine. This underwater mountain range is home to a great diversity of life, with colors typically associated with a coral reef rather...
Remotely located in the central Pacific Ocean, south of Hawaii, the Line Islands provide a remarkable research opportunity. The archipelago includes coral reefs reflecting the whole spectrum of...
Researchers use Autonomous Reef Monitoring Structures (ARMS) like this one to study the diversity of coral reef organisms. They leave the structures underwater for about a year. Then they retrieve...
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