Thursday, February 20, 2014

Big Brained Killer Whales

Orcas have the second-heaviest brains in the marine mammal world.  

Picture from NMFS

The largest mammalian brain belongs to the sperm whale, one of the biggest cetaceans in the sea.  The mature adult sperm whale's brain weighs an average of 18 pounds, and can grow to be nearly 500 cubic inches in size.

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