An orca pod has been harassing and killing porpoises for decades — but they don't eat them. Scientists still don't know why.

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tops of killer whales above water in Pacific Northwest
Killer whales near the San Juan Islands in Washington.

Wolfgang Kaehler/Getty Images

What happens to sharks, dolphins, alligators, and other marine life during a hurricane? Experts explain why the storm's aftermath is often more deadly

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A blacktip shark swims near a school of fish in the Indian Ocean near South Africa
Researchers studied how blacktip sharks travel when tropical storms and hurricanes approach.

Reinhard Dirscherl/Getty Images

Graphic video shows orcas hunting and eating dolphins near San Diego. Orca scientist says they just like playing with their food.

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two orcas pursue a dolphin which is about the size of their fins in deep blue water
A screengrab from the video shows a juvenile orca following an adult as it hunts a dolphin.

Domenic Biagini/Gone Whale Watching San Diego

Dolphins are dying in droves in the Black Sea, and Ukraine says it's evidence that Russia is committing a new kind of war crime

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A stranded dolphin on the Black Sea.
A stranded dolphin on the Black Sea.

rai36de/Getty Images

Brazilian fishermen follow instructions from wild dolphins to know where to throw their nets, video shows

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A dolphin peeps up at a fisherman on a boat.
A dolphin and a fisherman in Laguna, Brazil. Dolphins and humans have learned how to fish together in this little beach-side town, a study found.

Fabio G. Daura-Jorge

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