Prehistoric Fish of the Rocky River ID: 7622 | This file appears in: Dunkleosteus To listen to this audio please consider upgrading to a web browser that supports HTML5 audio Cleveland Metroparks Aquatic Biologist Mike Durkalec describes some non-fossilized prehistoric fish that can be found in the Rocky River. | Source: Cleveland Regional Oral History Collection Download Original File SourceCleveland Regional Oral History CollectionRelation“Michael Durkalec interview, 22 August 2012,” Cleveland Voices, clevelandvoices.org/items/show/2903 "Prehistoric Fish of the Rocky River" appears in: Dunkleosteus