Opisthoproctidae

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Opisthoproctidae (barreleye, spook-fish; subclass Actinopterygii, order Salmoniformes) A small family of some-what bizarre fish: they are of variable form, but the eyes are usually tubular and directed upward. They tend to be deep-sea fish, rarely exceeding 15 cm in length, and have a cosmopolitan distribution. There are about 11 species.