Fossilized fish (46 inches long) swallowing another fish Mioplosus labracoides eating Diplomystus dentatus From the Green River Formation, Eocene epoch, Tertiary period, Cenozoic era Southern Wyoming, USA Photographed under controlled conditions

Fossilized fish (4,6 inches long) swallowing another fish, Mioplosus labracoides eating Diplomystus dentatus, From the Green River Formation, Eocene epoch, Tertiary period, Cenozoic era, Southern Wyoming, USA Photographed under controlled conditions (Specimen courtesy of Rick Hebdon, Thayne, Wyoming), (Photo by Wild Horizons/Universal Images Group via Getty Images)