Remarkable Ohio


Below is a complete listing of all Ohio Historical Markers. To find a detailed marker listing including text, photographs, and locations, click on a county below. Our listing is updated by the markers program as new markers are installed and older markers are reported damaged or missing.

12-47 Jay Terrell and his “Terrible Fish”

Side A: Around 1867, along the shale cliffs of the lakeshore of Sheffield Lake, Jay Terrell found fossils of a “terrible fish” later named in his honor as Dinichthys Terrelli. This animal, now known as Dunkleosteus terrelli, was a massive arthrodire (an extinct, joint-necked, armor-plated fish) that lived in the Devonian sea, which covered much of eastern North America some 354-364 million years ago. Dunkleosteus was armed with an incredible set of shearing jaws and was clearly the top marine predator in the Devonian Period (the “Age of Fishes”).
Side B: Same
Sponsors: Ohio Bicentennial Commission, The Longaberger Company, Sheffield Lake Park Board, and The Ohio Historical Society
Address: Lake Road (US 6), 
Sheffield Lake, 
Location: Shell Cove Park, Lake Road (US 6)
Latitude: 41.4952935
Longitude: -82.0885812