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Pearleye
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Pearleye : ウィキペディア英語版
Pearleye

The pearleyes are a family, Scopelarchidae, of aulopiform fishes, distinguished by their unique visual system, with two retinas in each eye.
They are small to medium fish, ranging in size from just in adult length to in length, depending on species. They have a similar appearance to lizardfishes, with a large mouth, numerous teeth, and a forked tail. The dorsal fin is located in the middle of the back, with a small adipose fin.〔
Like many other deep-sea fish, their eyes are telescopic, allowing them to see in near darkness. However, unlike any other fishes, their eyes also possess a "pearl organ"; a white spot on the surface of the eye that may help to pick up light from the side of the fish, out of the normal visual field. The pearl organ is associated with a secondary retina, allowing the fish an unusually wide field of view.〔
Pearleyes typically live between , although some species may visit shallower waters during the night.〔
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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