Did You Know?


An octopus pupil is rectangular.

An octopus pupil is rectangular.

Octopus, squid, cuttlefish, and nautilus all have differently shaped pupils— an octopus has a rectangular pupil, a cuttlefish has a w-shaped pupil, and a squid’s pupil is circular. Despite the complexity of their eyes, cephalopods are most likely colorblind.


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