Discover Earthのインスタグラム(discoverearth) - 3月1日 02時56分

A cuttlefish’s skin isn’t the only part of its body that’s subject to change. The pupil will change shape in different lighting conditions. Under bright light conditions a cuttlefish displays a distinctive W-shaped pupil. However, in darkness the pupil becomes large and circular.

Full contraction takes less than 1 second.

🦑 #discoverearth with @huntingforparadise

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