An unusual observation of a six-gilled stingray, Hexatrygon bickelli.
Six-gilled Stingray
Image courtesy of the NOAA Office of Ocean Exploration and Research, Deep-Sea Symphony: Exploring the Musicians Seamounts. Download larger version (jpg, 1.1 MB).

An unusual observation of a six-gilled stingray, Hexatrygon bickelli.

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