Dr. Colleary points to the bony-plated skull of an extinct giant carnivorous fish. "This is dunkleosteus. It was living here in Cleveland about 359 million years ago when Cleveland was the ocean." ...

Its skull alone was 4 feet long -- the entire animal was 20 feet long and probably weighed more than a ton. The original fossil skull is displayed at the Cleveland Museum of Natural History.

The Dunkleosteus skull, a reproduction of an original on display at the Cleveland Museum of Natural History, was being held up by two cardboard boxes.

A dunkleosteus skull, seen on display in the Muséum National d'Histoire Naturelle in Paris, France. (Wikipedia) ERIE, Pa. – Present-day Erie was under a saltwater ocean 364 million years ago.

Dunkleosteus terrelli may have been the world's first apex predator. The force of its bite was remarkably powerful: 11,000 pounds. The bladed dentition of this 400-million-year-old extinct fish ...

CLEVELAND, Ohio — Deep in the basement of the Cleveland Museum of Natural History, they're telling fish stories. "It was this big!" exclaims Dr. Caitlin Colleary, with arms outstretched. The ...