god i hate the term killer whale.
1)while they are also cetacean which includes whales, the "killer whale" is actually a dolphin, the largest member of the dolphin species.
2)while they can dispense with pretty much any living thing in the ocean, attacks on humans are exceedingly rare.
3)comparing a great white shark to an orca is like comparing a 22 caliber handgun to a smart bomb, in other words no comparison cuz the orca probably has the intelligence of a human or beyond. anatomically speaking their forebrains are larger than humans.
Quote:
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The lack of information on "killer whale" brains is likely due to the difficulties associated with preparing and examining such a large brain (approximately 5,000 g). Yet understanding killer whale neuroanatomy is important because, like the bottlenose dolphin, killer whales show evidence of many complex and unusual social, communicative, and cognitive capacities.
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http://onlinelibrary.wiley.com/doi/1...r.a.20075/full
while on the other hand a shark is a fish.