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. 

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Hawaiian Monk Seal

DIVE DEEPER

Backbone of Biodiversity at Risk

The International Union for the Conservation of Nature ( IUCN ) maintains the Red List of Threatened Species , an inventory...

Efforts to Protect the Critically Endangered Monk Seal

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 (...
Giant Pacific Manta Ray, Roca Partida Sea Mount, Revillagigedos Islands, Mexico

Tagging and Tracking Animals Underwater

“Manta rays sometimes approach divers; an up-close encounter with such a huge, peaceful animal is unforgettable!” -- Nature's Best photographer, Deborah Smrekar. Equipment Used to Capture the Shot: Nikon D70; 12-24mm; 1/100 sec at...

Seal and Sea Lion Pictures

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...

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