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A humpback whale breaching in Antarctic waters.
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Humpback Whale in Antarctic Waters

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Close-up photograph looking into the gaping mouth of a golden brown sea lion, lying on the sand.
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Galapagos Sea Lion Yawning

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Two nurse sharks hover over a baited cage
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How do Humpback Whales Feed?

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A graph showing the population decline of vaquitas from 1997 to 2019. In 1997, there were 567 vaquitas. In 2012, there were 200. By 2014 there were fewer than 100, and by 2019 there was an estimated 6 to 9 vaquitas left.
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A Population in Decline

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Juvenile California sea lion
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Acrobats of La Paz, Mexico

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A bottlenose dolphin carries a sponge, which it uses as a tool to dig up prey from the seafloor.
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Sponge-Wielding Bottlenose Dolphin

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The right whale Phoenix, and her calf, swimming off the coast of Florida.
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Phoenix and Her Calf Sighted in February 2012

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Male northern elephant seals face off for the best beach territory for mating season.
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Elephant Seals Tussle for Territory

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Nick Pyenson points to a skull and skeleton of a fossil whale.
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An Ancient Whale Skeleton, Unexcavated

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a gray whale pokes its head above the sea surface
Article

Atlantic Gray Whales: Past, Present, and Future

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The head of one bottlenose dolphin and the fin of another are visible above turquoise water in the Potomac River
Article

A Dive into Dolphin Data: The History of Bottlenose Dolphins in the Potomac River

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False killer whales form close bonds which can result in them getting stranded in large groups.
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The Killer Whale Imposter

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