Ancient bony fish that was larger than a whale shark and a fast swimmer

The findings might help settle an important debate among biologists.

Ancient 420-million-year-old fossil hints of bony fish and cartilaginous fish common ancestor

Based on fossil evidence and genome analysis, scientists know that the two groups diverged from a common ancestor around 420 million years ago, but we’ve yet to find actual fossil of it. Things are shaping up though after paleontologists have identified an Early Devonian fish from Siberia, approximately 415 million years old, which bears features of both classes.