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Killer whales ( Orcinus orca ) are master hunters, using speed, camouflage, and a variety of techniques to capture their prey. See how a different predator - the great white shark - finds its...
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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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Whales swimming in the ocean are never really alone. Even if one swims by...

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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 unique ecosystem. Fish aggregate...
The small vaquita ( Phocoena sinus ), a type of porpoise, usually only...
Three distinct types of killer whale, or orcas, can be found in the...

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The International Union for the Conservation of Nature ( IUCN ) maintains the Red List of Threatened Species , an inventory...
Polar bear siblings in the Churchill Wildlife Management Area near Hudson Bay spar playfully during migration.
The critically endangered Hawaiian monk seal ( Monachus schauinslandi ) is one of hundreds of marine species that can be found cruising the waters of Papahānaumokuākea, a chain of islands northwest...
A male sperm whale feeding near the surface. Sperm whales are a toothed whale , rather than a baleen whale , and are found throughout the world's oceans.
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...
This is North Atlantic right whale #3333 who was spotted with fishing gear trailing from his mouth during an aerial survey off the coast of Georgia on January 29, 2008. Entanglement is one of the...
Harp seals are protected in the United States by the Marine Mammal Protection Act . Although they are not considered endangered, as sea ice melting earlier and earlier each year, available harp seal...
Killer whales ( Orcinus orca ) are master hunters, using speed, camouflage, and a variety of techniques to capture their prey. See how a different predator - the great white shark - finds its prey in...
A Twelve-Step group for wild animals with people-food addictions? Don’t be responsible for getting a dolphin hooked on human handouts! This cartoon satire portrays a dolphin trying to break his...
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...
Hoping to hear bowhead whales , NOAA marine mammal scientist Sue Moore listens to real-time sounds from an underwater hydrophone.
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...
Both humans and sea lions get sick from eating fish and shellfish that have been feeding on harmful toxic algae. Studying the sick sea lions brings scientists closer to understanding and preventing...
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...
For being so big, right whales eat very small food, which they catch using baleen. Baleen is the series of fringed plates hanging in right whales' mouths that are used to strain seawater for food...
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...
Many animals depend on their eyes to navigate, find food, locate mates, and for other important activities. But marine mammals often rely on sound—sometimes far more than sight—for such critical...
The ocean is home to many moms of all shapes and sizes: from charismatic polar bears and dolphins to small fishes and shrimps and more. Learn about some of the diverse parenting habits of marine moms...
At the ends of the Earth, life thrives despite extreme conditions. In the Arctic and Southern Oceans, organisms have evolved adaptations to cope with year-round cold and six months of darkness. But...
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