Orcas have been called "The Wolves of the Sea."  That being said, I'm not sure I would like to find myself in the situation in which these divers find themselves in this video posted by Sam Galloway on August 9, 2015:


At least the whales seemed only inquisitive.  Divers do resemble seals in many ways--and seals are known as a food source for Orcas.  But, whales are very intelligent; maybe they can actually tell the difference...

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