<I>Pentanogmius fritschi</I> (IMAGE) Perot Museum of Nature and Science Caption A 90-million-year-old fossil fish, currently on display at the Perot Museum of Nature and Science in Dallas, turns out to be a new species. Research conducted by Kenshu Shimada, Ph.D., professor at DePaul University and research associate of the Sternberg Museum, reveals the 5.5-foot-long fossil fish to possess a tuna-like body with a unique 'hook-shaped sail' on its back. The fish's new species name, Pentanogmius fritschi, is in honor of local amateur collector Joseph Fritsch. Credit Photo by Kenshu Shimada, Ph.D. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.