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Trachipteridae (ribbonfish, dealfish; subclass Actinopterygii, order Lampridiformes) A small family of marine fish that have a much compressed body, gradually tapering to a very thin tail with a small tail fin. The mouth is small, but the eyes are large. Typically, they have a very long dorsal fin, originating on the head and continuing to the tip of the tail; the anal fin is absent. Probably living at depths of 200–1000 m. Trachipterus altivelis (ribbonfish, or king-of-the-salmon) of the Pacific may reach a length of about 2 m. There are seven species, distributed worldwide.

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