Ceph keeper Nancy King discovered that her two-spot, Ollie, didn’t always see where the live crabs she dropped in to feed her had landed. So she took to helping her, using her index finger on the outside of the aquarium to show her where the prey was hiding. Ollie soon figured out the meaning of the pointing finger. (This is a very specialized skill. Dogs—but not their direct ancestors, wolves—are among the tiny handful of species other than humans who can do this.) “In this way,” she charmingly wrote, “Ollie and Nancy hunted crabs together.”
