Grigori is the name of the octopus that Ned Pointsman and Roger Mexico train to attack Katje, the kinky secret agent, in Thomas Pynchon's novel Gravity's Rainbow. They force Grigori to watch movies of an octopus attacking a woman over and over.

This is where I learned that an octopus can function perfectly well even after entire sections of its brain have been removed. This is why octopi are often used in brain research experiments. Remove half a brain and an octopus still knows the best way of killing a crab.

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