A W inside the eyeSourced
The pupil is neither round nor a simple slit
Cuttlefish have large W-shaped pupils. Their eyes offer a distinctive detail alongside the better-known changes in body appearance. Despite the fish in the English name, they are cephalopod molluscs, related to squid and octopuses.
Look past the body pattern to the outline inside the eye.
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Cuttlefish · Wikimedia contributors
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Reviewed: 2026-10-05