four-eyed fish


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four-eyed fish

n
(Animals) either of two viviparous tropical American freshwater cyprinodont fishes, Anableps anableps or A. microlepis, that swim at the surface of the water and have half of each eye specialized for seeing in air, the other half for seeing in water
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So-called four-eyed fish double each of their two eyes, one half better tuned to seeing above water and the other better for below the surface.
ZOOLOGISTS are celebrating after a pair of rare four-eyed fish were born at their aquarium.
"What makes this animal so unusual is that each eye is divided into two parts, one pointing upwards and one pointing downward, making it look like it has four eyes, and four-eyed fish don't exist," says Frank.