Dunkleosteus

All About Dunkleosteus

Dunkleosteus was a very big fish that lived long, long ago. It swam in the oceans about 382–358 million years ago during a time called the Late Devonian. These fish were not like the ones we see today. They had strong, bony plates that helped protect them.

Dunkleosteus lived in open waters, far from shore. Fossils of these amazing fish have been found in places like the United States, Canada, Poland, Belgium, and Morocco. Scientists first found Dunkleosteus fossils in 1867 near Lake Erie in Sheffield Lake, Ohio. A man named Jay Terrell, who loved collecting rocks and bones, gave the fossils to a scientist named John Strong Newberry.

The most famous kind of Dunkleosteus is called D. terrelli. Most of these fish were about 3.4 metres (11 feet) long, but some were even bigger—up to 4.1 metres (13 feet)! They had very strong bones, especially around their heads, which made them special and strong swimmers.

Scientists named Dunkleosteus in 1956 to honor a man named David Dunkle, who studied old fish bones. The name means “Dunkle’s bone” because of the strong bones found in the fossils. Today, many museums around the world have fossils of Dunkleosteus, including the Cleveland Museum of Natural History, the American Museum of Natural History, the Smithsonian National Museum of Natural History, and the Natural History Museum in London. These fossils help us learn about the big, strong fish that lived so long ago.