12" Unprepared Fossil Fish (Diplomystus) - Green River Formation

This is an unprepared fish plate that likely contains a Diplomystus dentatus, collected from the Green River Formation near Kemmerer, Wyoming. It appears to be around 12-13" in length. It's nicely centered on a 20 x 13" slab of rock.

While the fish does appear to be complete and articulated, as with all unprepared fossils there are no guarantees. You don't know what will be under the surface.