A striking Mioplosus fossil slab from the renowned Green River Formation in Wyoming, dating to the Eocene (~50 million years ago). This extra-large specimen (33.5 cm) features a beautifully preserved predatory Mioplosus along with a smaller companion fish on the same matrix, creating a visually dynamic and scientifically fascinating display.

Mioplosus labracoides was a fierce freshwater predator related to modern perches, often found with smaller fish in its jaws. The fossil shows superb skeletal and fin detail, clearly outlined in fine-grained limestone typical of the Green River Formation’s exceptional preservation.

This impressive, display-ready slab is ideal for collectors, museums, or educational settings—showcasing one of the formation’s most iconic species in a rare dual-fish composition.