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Orca appears to adopt (or abduct) a baby pilot whaleResearchers have recorded an orca swimming with a pilot whale calf in a possible interspecies adoption, but how the two came together is a mystery.
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Orca males are burnouts who let their moms do all the hunting, surprising study findsMama orcas are forgoing having more young and instead dote on their existing sons.
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Grisly new footage shows orcas attacking a great white shark and eating its liverNewly released video shows a gang of killer whales in South Africa attack and slaughter a great white shark.
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Orcas and humpbacks clash in a violent melee of breaching and bitingWhale watchers in British Columbia recently witnessed an intense showdown between a group of 15 transient killer whales and a pair of female humpback whales in the Salish Sea.
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Orcas are attacking boats near Europe. It might be a fad.Orcas are snapping the rudders off boats near Europe, and it may be a cetacean fad.
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The weird reason dolphins drink each other’s peeDolphins can recognize each other by the taste of their pee, and urine-tasting behavior is also linked to "name" recognition.
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Red Sea dolphins slather their skin in coral mucus, because nature is wonderfully grossYoung dolphins seem to learn this skin care routine from their elders.
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Killer whales spotted for the first time killing blue whalesKiller whales can hunt and kill blue whales, according to three documented episodes in Australia.
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'Grandma' killer whale missing from pod, feared deadOne of the Southern Resident orcas, a 47-year-old female known as L47, hasn't been seen by census takers since February.
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