And the Ocean Was Our Sky | Patrick Ness

"Call me Bathsheba." The whales of Bathsheba's pod live for the hunt. Led by the formidable Captain Alexandra, they fight a never-ending war against men. Then the whales attack a man ship, and instead of easy prey they find the trail of a myth, a monster, perhaps the devil himself... With their relentless Captain leading the chase, they embark on the final hunt, one that will forever change the worlds of whales and men.