Colossal Squid Possesses the Largest Eyes in the Animal Kingdom

This squid's eyes are larger than dinner plates.

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The colossal squid also possesses swiveling hooks on its tentacles for gripping prey.

The colossal squid has eyes measuring up to 27 centimeters in diameter, the largest known in any animal. These massive organs help it detect faint light and approaching predators in the deep Southern Ocean.

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An eye nearly the size of a football allows detection of bioluminescent disturbances caused by massive predators such as sperm whales, giving the squid a split-second survival advantage in near-total darkness.

Such extreme sensory scaling illustrates how evolutionary pressure in deep, dim waters can push biological organs beyond what seems physically reasonable, creating anatomy that rivals mechanical searchlights in sensitivity.

Source

Smithsonian Ocean

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