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The killer whales regularly demonstrate their competence by chasing seals up shelving gravel beaches, up to the edge of the water. The pursuing whales are occasionally partially thrust out of the sea by a combination of their own impetus and retreating water, and have to wait for the next wave to re-float them and carry them back to sea.
Humpback whale breach sequence. A breach or a lunge is a leap out of the water, also known as cresting. The distinction between the two is fairly arbitrary: cetacean researcher Hal Whitehead defines a breach as any leap in which at least 40% of the animal's body clears the water, and a lunge as a leap with less than 40% clearance. [2]
In the case of orcas like Tahlequah, this includes addressing environmental issues such as water pollution, damming rivers, and overfishing. And she might be the best encouragement for advocacy yet.
Blue Planet II is a 2017 British nature documentary series on marine life produced as a co-production between the BBC Natural History Unit, BBC America, Tencent, WDR, France Télévisions, Tencent and CCTV-9 in partnership with The Open University.
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For example, orcas are known to intentionally beach themselves to catch pinniped prey. [33] Mother orcas teach their young to catch pinnipeds by pushing them onto the shore and encouraging them to attack the prey. Because the mother orca is altering her behaviour to help her offspring learn to catch prey, this is evidence of teaching. [33]
The fight lasted for three hours and ended with the whales giving up and swimming away into the fog.