Fish of dinosaur era with unique ‘hook-shaped sail’ on its back

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 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.
Paleontology News — ScienceDaily

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