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Many people love seals and sea lions, and it's easy to see why: they’re playful, adorable, and quite photogenic. But what is the difference between seals and their cousins the sea lions? Both have...
Humpback whales ( Megaptera novaengliae ) are the most abundant baleen whale in...
In the late 1990's, researchers at the Woods Hole Oceanographic Institution (...
Killer whales ( Orcinus orca ) are master hunters, using speed, camouflage, and...

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The polar bear ( Ursus maritimus ) is found in the Arctic and classified as a vulnerable species by the IUCN Red List of Threatened Species. This marine mammal can swim more than 30 miles when sea ice has receded due to warm...
Humpback whales ( Megaptera novaengliae ) can be found in Antarctic waters...
Harp seals are protected in the United States by the Marine Mammal...

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Stretching up to 16.8 meters (55 feet) long and weighing up to 62 tons (70 tons), the North Atlantic right whale is one of...

The Ocean Blog

The Encyclopedia of Life and Atlantic Public Media bring us another installment of the podcast, One Species at a Time . In this podcast, host Ari Daniel Shapiro relates two close calls with polar...
“At night, spotted dolphins move offshore into the Gulf Stream’s deep waters in search of squid.” -- Nature's Best photographer, Andrew Sallmon. See more beautiful ocean photos in our slideshow of...
Male northern elephant seals face off on the beach by vocalizing through their extended noses, called proboscises. Every winter, when the seals return to the beach where they were born to breed,...
To people living in warm climates, all ice looks the same. But if you live day-in and day-out on sea ice, like the Inupiaq people of Alaska, you would find that there are many kinds of ice, all...
The Natural System of Wrangel Island Reserve site in Russia was inscribed on the World Heritage List in 2004. Located well above the Arctic Circle, the site includes the mountainous Wrangel Island,...
In December 2003, researchers spotted Phoenix off the coast of Florida with her second calf. More about the right whale can be found in our Tale of a Whale featured story .
A manatee swimming in shallow waters. The West Indian manatee is listed on the IUCN's Red List of Threatened Species as Vulnerable. More about mangroves can be found in our Mangroves featured story .
How do we know where ocean animals swim day and night? Scientists are getting snapshots into the daily lives of whales , sharks , and even fish by tagging the animals to track their movements. You’ve...
Hear how research unfolds at sea in a tiny Zodiac surrounded by creatures that measure longer than a city bus. Playing female whale calls into the water, researcher Susan Parks suddenly finds herself...
The North Atlantic right whale is one of the world's largest animals, but scientists estimate that fewer than 450 remain. In the past, they were hunted for their oil and baleen; now they get tangled...
Scientists document a direct relationship between the extent of sea ice and polar bear survival. Future projected reductions in the extent of annual sea-ice due to global warming may result in the...
The Endangered Species Act (ESA) was signed into law on December 28, 1973 by President Nixon. Over 2,000 species are currently on the ESA, and they are separated into "Threatened" and "Endangered"...
I have a vivid childhood memory of sitting under the Blue Whale model hanging in the Natural History Museum in London, eating an ice cream and wondering “How in the world did that whale get so big?”...
Beluga whales are naturally vocal animals. They are often called “ canaries of the sea ” thanks to their wide repertoire of sounds such as whistles, squeals, moos, chirps, and clicks. Some...
When a whale dies, the story has just begun. The massive carcass sinks to the seafloor, where it provides food for a deep sea ecosystem on the otherwise mostly barren seafloor. There are several...
The elegant Antarctic minke whale feeds on krill (tiny crustaceans) during the winter. Groups of minke whales often are found on the edges of pack ice feasting so that they can grow thick layers of...
When a critically endangered North Atlantic right whale becomes entangled in fishing gear, members of a response team from the Atlantic Large Whale Disentanglement Network spring into action. In the...
Since 1987, researchers have been tracking Phoenix. More about whales can be found in our Tale of a whale featured story .
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