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CuttlefishThe 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? (back) Photo: Animals Animals/© W. Gregory Brown. Night Vision | Camera that Caught a Leopard Behind the Scenes | Seeing through Camouflage Resources | Transcript | Site Map | Leopards Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000 |