Researchers at the Monterey Bay Aquarium Research Institute (MBARI) captured this image of a barreleye fish (Macropinna microstoma) in the deep waters just offshore of Central California from a video taken by a remotely operated video at depths of 2,000 to 2,600 feet. Since it was discovered in 1939, the barreleye's vision has been a mystery, until scientists at MBARI solved it on Feb. 23, 2009. The barreleye has extremely light-sensitive, tubular eyes that can rotate inside of its transparent head. Capped by bright green lenses, the fish's eyes point upward when it looks for food overhead, and then they point forward when the fish is feeding to focus on its prey. (Courtesy Monterey Bay Aquarium Research Institute)
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