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). The species Portheus molossus described by Cope is a juni.....
Found on
http://en.wikipedia.org/wiki/Xiphactinus
(from the article `Cretaceous Period`) ...the long-necked plesiosaurs and the more fishlike ichthyosaurs. Sharks and rays (chondrichthians) also were marine predators, as were the teleost ...
Found on
http://www.britannica.com/eb/a-z/x/2
No exact match found.
