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Unique genetic adaptation lets deep-sea fish see color in the darkness

09 / 05 / 2019, Yahoo Science

Researchers analyzed the genomes of 101 fish species and found that three lineages of deep-sea fish, living up to about a mile (1,500 meters) below the surface, boast a specialized visual system to allow for color vision in inky blackness. Having acute vision could provide tremendous advantages to these fish as they search for food and mates and try to avoid becoming another creature's dinner in the exotic dark world of the ocean depths, the planet's largest habitat. Vertebrates use two types of photoreceptor cells in the retina to see: light-sensitive so-called rods and cones.

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