Meet the Thresher Shark

The sharks disappeared as each wave rolled toward me; then a new wave would swell above the horizon, containing in it, like scorpions in amber, sharks that roiled and heaved. The sight held awesome wonders: power and beauty, grace tangled in a rapture with violence.

An animal that can change itself to match its surroundings, just by contracting its skin? That can weigh as many stone as a man and stretch the length of a carriage, and yet fold its body through a crevice? Whose brain is wrapped about its throat—a brain no larger than a pea—but who is clever enough to play actual games? An animal with this much in

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