Transparent headed Pacific barreleye fish



The head of the Pacific barreleye fish is transparent shows its highly sensitive, barrel-like eyes topped by green, orblike lense.

The fish, discovered alive in the deep water off California’s central coast by the Monterey Bay Aquarium Research Institute (MBARI), is the first specimen of its kind to be found with its soft transparent dome intact.

The 6-inch (15-centimeter) barreleye (Macropinna microstoma) had been known since 1939–but only from mangled specimens dragged to the surface by nets.


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