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In the late 1990's, researchers at the Woods Hole Oceanographic Institution (WHOI) invented the D-Tag —a radio device that can be attached by suction cups to a whale's back. Using a tiny underwater microphone,...
Killer whales ( Orcinus orca ) are master hunters, using speed, camouflage, and...
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In honor of Mother's Day, the Citizens of the Sea blog salutes ocean-going...
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How do we know where ocean animals swim day and night? Scientists are getting...

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Bottlenose dolphins ( Tursiops truncatus ) are very social animals, and often travel and hunt in groups called pods. The most common is a nursery group of 5-20 dolphins made up of females and their calves—although occasionally...
The North Atlantic right whale is one of the world's largest animals, but...
A 2010 study of IUCN's Red List of Threatened Species found that one-fifth...

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The International Union for the Conservation of Nature ( IUCN ) maintains the Red List of Threatened Species , an inventory...
A North Atlantic right whale with a deep wound caused by entanglement in fishing gear floats at the surface in the Bay of Fundy on August 1, 1999. Crew members on the International Fund for Animal...
Marine mammals around the world face many challenges due to interactions with people, from overfishing and entanglement to vessel strikes and disturbance from human sounds. Dr. Brandon Southall...
A crew works on creating a life-size, meticulously detailed model of the North Atlantic right whale Phoenix—the “ambassador” of the Smithsonian’s Sant Ocean Hall in the National Museum of Natural...
Since 1987, researchers have been tracking Phoenix. More about whales can be found in our Tale of a whale featured story .
Three distinct types of killer whale, or orcas, can be found in the Antarctic, each with a different habitat and diet preference. One type of orca preys almost exclusively on the Antarctic minke...
On a beach in Piña, Panama the tide is rolling out. Faint outlines of skeletal remains rise above the sand. Smithsonian scientists Nicholas Pyenson and Aaron O'Dea along with a team of students...
Humpback whales ( Megaptera novaengliae ) are the most abundant baleen whale in the nearshore waters around the Antarctic Peninsula. They, along with millions of penguins, seals, seabirds, and other...
Narwhals ( Monodon monoceros ) are a type of toothed whale, best known for their long unicorn-like tusk. The tusk is normally found on male narwhals and is actually a tooth. Narwhals usually live in...
January 14, 1987: Phoenix is first spotted as she swims with her mother, Stumpy, off the coast of Georgia. More about right whales can be found in our Tale of a whale featured story .
The Smithsonian Marine Mammal team moves into action after a dead sperm whale is spotted floating off Cape Hatteras, N.C. Smithsonian marine mammalogist Dr. James Mead is in the water.
In 1996, at age nine, Phoenix has her first calf (North Atlantic right whale #2605) off the southeast coast of Florida. More about the right whale can be found in our Tale of a Whale featured story .
Watch a recorded webcast about the latest efforts in Greece to study and save the critically endangered Mediterranean monk seal. Centuries of human exploitation and habitat destruction have caused...
Seals and sea lions have many similarities, and are in the same family of Pinnipeds, but they lead very different lives. Seals are smaller than sea lions; male Stellar sea lions can grow to be up to...
Phoenix swimming with her calf in February 2007 in the Southeast calving grounds off the coasts of Georgia and Florida. Researchers track these highly endangered whales (there are only about 450 of...
A still from Where the Whales Sing , part of the 19th Annual Environmental Film Festival in the Nation's Capital.
California is known for it’s lovely beaches, good food, and sloping hills. But take a dive into the colder waters, and discover a new type of wonder: the California kelp forest. The kelp forests are...
Dugongs , along with manatees , make up a group of marine mammals called sirenians or seacows . In the modern world, only one species of seacow is found in any one place in the world. However, the...
Monk seals -- the only completely tropical species of seal in the world -- are in trouble. Centuries of human exploitation and habitat destruction have caused the remaining populations of...
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