Octopuses can feel light with their arms – Livescience.com

Octopuses can “see” light with their arms, even when their eyes are in the dark, researchers have found. When the arms of the octopus detect light, the eight-armed creature pulls them close to their body.
Because octopuses generally have a poor sense of where their body is in space, this complex instinctive behavior might help protect their arms from the pincers of predators nearby that they might otherwise not sense. 
Scientists have long known that octopus arms react to light. Their skin is covered…

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