Remarkably Large Eyes Help Sixgill Sharks Exploit Faint Bioluminescent Glows

Its eyes are built to catch the weakest flicker in black water.

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Many deep-sea organisms generate their own light through chemical reactions.

Sixgill sharks possess relatively large eyes adapted for low-light environments, allowing them to detect faint bioluminescent signals produced by deep-sea organisms. Even minimal photon availability can inform hunting behavior.

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Bioluminescent flashes may reveal prey position in otherwise opaque darkness. Large pupils and retinal adaptations enhance sensitivity in light-starved habitats.

A predator the length of a car navigating by microscopic flashes of living light illustrates how deep-sea survival blends scale with subtlety. Gigantism does not eliminate precision.

Source

Smithsonian Ocean Portal

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