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Cuttlefish Cuttlefish

The cuttlefish is a cephalopod that buries itself in sediment by day and becomes active at night. The pupil of its highly sensitive eye, which sees as well as a human eye, is protected with a flap-like appendage that can close completely in bright light.

What's different about the nocturnal eye?


Photo: Animals Animals/© W. Gregory Brown.

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