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Scopelarchidae (pearleye; superorder Scopelomorpha, order Myctophiformes) A small family of marine, midwater fish that have an elongate body, large mouth, large, upward-directed eyes, and the small dorsal fin followed by an adipose fin. Some species, e.g. Benthalbella dentata (23 cm), which can be found at depths of more than 1000 m, have a large, glistening spot near the eyeball. There are 18 species, distributed world-wide.