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Old 08-04-2016, 04:48 PM   #10
octothorp
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I think the most likely explanation is that because Humpbacks need to have the ability to foil orca attacks for their own survival, and responding to Orca hunt behavior even when they aren't the subject of the attack is essentially practice for when they are the targets. It increases their abilities to anticipate and react to orca hunting behavior.

At least personally, I think that's far more likely than the Humpbacks behaving altruistically.
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