Mammals

From whales and dolphins to seals and sea otters. Marine mammals are defined by their reliance on the ocean for food, along with mammalian characteristics such as hair and mammary glands. 

FEATURES

Video
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 Mediterranean monk seals (...
Blog entry MORE STORIES Blog entry MORE AUDIO / VIDEO
Sirenians , or seacows, are a group of marine mammals that include manatees and...
John Hildebrand discusses his research at the Scripps Whale Acoustic Lab on the...
Slideshow MORE STORIES Slideshow MORE AUDIO / VIDEO
Many people love seals and sea lions, and it's easy to see why: they’re playful...

LATEST CATCH

Lying on the ice with a few friends is not an unusual way to spend time for walruses, who tend to be sociable animals. Their groups can range from tens to thousands. Each individual herd has a dominant male who is established by...
Bottlenose dolphins ( Tursiops truncatus ) are very social animals, and...
The North Atlantic right whale is one of the world's largest animals, but...

DIVE DEEPER

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...
Researchers frequently track North Atlantic right whales from ships or from the air. This video of Phoenix (left) was captured in March 2009 on George’s Shoal, east of Chatham, Mass. Learn more about...
Sirenians , or seacows, are a group of marine mammals that include manatees and dugongs . Currently, only a single species of seacow is found anywhere in the world. However, the fossil record of...
Fargo, the dog pictured here, is not just having a relaxing day at sea. He is helping researchers at the New England Aquarium in Boston detect scat (or poop) from North Atlantic right whales . The...
West Indian Manatees, Trichechus manatus , are found in warm, shallow coastal ecosystems along the southeastern North America and northeastern South America. They graze plants in mangrove ecosystems...
Monodontids, the group of whales that includes the belugas and narwhals swimming our ocean today, are emblematic symbols of the Arctic. However, their fossil record, although scarce, suggests that...
Editor's note: Read Nick's first blog post about "toothed" baleen whales to see what their team is excavating on Vancouver Island. We departed from Port Renfrew on Tuesday morning on the Michelle...
This sea lion has been caught in killed in a giant drift net, or a “curtain of death,” as photographer Tom Woodward calls them. These giant drift nets, placed around the world’s oceans to catch...
There are more than 500 species of sharks swimming in the world’s ocean. Yet when most people think of these cartilaginous fish, a single image comes to mind: a large, sharp-toothed and scary beast...
Florida Manatee ( Trichechus manatus latirostris ) swimming within a fresh water spring on Crystal River in Florida. Note the tree roots on the right of the frame which make up a portion of this...
Yankee Whalers: An 1856 Currier & Ives print shows whalers harpooning a right whale. More about whales can be found in our Tale of a Whale photo essay .
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...
A team from the Center for Coastal Studies works to free a one-year-old right whale from the fishing ropes wrapped and knotted around its body and flippers. The whale is Kingfisher, #3346 in the...
Subscribe to Mammals