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"Dinosaur" Fish – Carnegie Museum, Forbes Avenue, Pittsburgh, Pennsylvania
Xiphactinus (from Latin and Greek for "sword-ray") is an extinct genus of large, 4.5 to 6 m (15 to 20 feet) long predatory marine bony fish that lived during the Late Cretaceous. When alive, the fish would have resembled a gargantuan, fanged tarpon (to which it was, however, not related). Xiphactinus were voracious predators. At least a dozen specimens of X. audax have been collected with the remains of large, undigested or partially digested prey in their stomachs.