NATIONAL GEOGRAPHIC HEALTH

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Dolphins Up Close
with Bertie Gregory

Bertie Gregory heads to the Azores, a vital marine sanctuary and seasonal hotspot for migrating ocean predators. During feeding season, thousands of elusive hunters gather to feast on massive bait balls. Battling storms and scanning vast seas, Bertie races against time to capture the most epic feeding frenzy of his career.

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Stream Dolphins Up Close with Bertie Gregory
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WHAT IS A DOLPHIN BAIT BALL?

A tightly packed bait ball surrounded by dolphins and shearwaters.

PHOTOGRAPH BY Bertie Gregory,National Geographic

A feast for the eyes—and for dolphins. Here’s the wondrous way bait balls form.

Watch how dolphins cleverly breech an enormous school of fish's defenses.

Humpback whales (Megaptera novaeangliae) like the ones pictured here with bottlenose dolphins (Tursiops truncatus) in Kona, Hawaii, appear to be more open to interacting with fellow cetaceans.

PHOTOGRAPH BY JAIMEN HUDSON

What do dolphins and whales think of each other? Scientists have new evidence.

Researchers analyzed nearly 200 whale-dolphin interactions, and conclude: They sure do seem friendly.

Goose-beaked whales (Ziphius cavirostris) hold the record for deepest dive of any marine mammal

PHOTOGRAPH BY VINCENT LEGRAND/AGAMI PHOTO AGENCY/ALAMY

The deepest-diving whales could inspire new treatments for stroke and cancer

Goose-beaked whales
hold the record for
the deepest dive of
any mammal.

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We just love a good dolphin fact, or five. 🐬

#DolphinsUpClose with @bertiegregory is now streaming on @DisneyPlus and @hulu.

READ THE FACTS

Two male dolphins have an aggressive encounter in the sea outside Rome.

PHOTOGRAPH BY DANIELA SILVIA PACE, CONISMA-TOR VERGATA UNIVERSITY OF ROME

Why Rome’s dolphins are fighting each other

Dolphins have lived near Rome for at least 2,000 years. Scientists fear for their future.

Pacific white-sided dolphins swim off the coast of British Columbia. Dolphins and porpoises in this region have been spotted swimming alongside a population of killer whales known as northern resident orcas. Scientists have theories about why.

PHOTOGRAPH BY PAUL NICKLEN, NAT GEO IMAGE COLLECTION

These dolphins have
orca ‘friends.’

Scientists have documented what might be the first case of friendly interactions between killer whales and smaller cetaceans.

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