While people and other vertebrates are color blind in dim light, some deep-sea f...
WASHINGTON - While people and other vertebrates are color blind in dim light, some deep-sea fish may possess keen color vision to thrive in the near total darkness of their extreme environment thanks to a unique genetic adaptation, scientists said on Thursday.
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. Rod cells contain a single type of photopigment - pigments that react to a certain wavelength of light - called rhodopsin. The researchers found 13 species from the three lineages of deep-sea fish that had a proliferation of genes controlling rhodopsin, apparently letting the fish use rods to detect colors. One species, the silver spinyfin, had 38 copies of the rhodopsin gene, rather than the usual one.
France Dernières Nouvelles, France Actualités
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