Prehistoric Planet Store - Replica fossils including dinosaurs like T. rex, Triceratops, and more!

Authentic Baby Knightia eocaena Green River Fossil Fish in Acrylic Case

This is a true example of an authentic Knightia eocaena Green River Fossil Fish from Kemmerer, Wyoming. It is Eocene Age approximately 53-48 million years old. Your specimen may be slightly smaller or larger. Your authentic specimen comes in a 3.5 x 2.5-inch acrylic display case with a detailed description of your specimen. Every fossil is one of a kind, unique. Your authentic fossil will be similar to the one shown in the photos. If you are not completely satisfied with your specimen you can return it for a full refund minus the shipping charges.

Knightia is an extinct genus of clupeid bony fish that lived in the freshwater lakes and rivers of North America and Asia during the Eocene epoch. It is the official state fossil of Wyoming and the most commonly excavated fossil fish in the world.

Knightia belongs to the same taxonomic family as herring and sardines, and resembled the former closely enough that both Knightia alta and Knightia eocaena were originally described as species of true herring in the genus Clupea.

As with modern-day clupeids, Knightia spp. likely fed on algae and diatoms, as well as insects and occasionally smaller fish.

In Knightia fish, rows of dorsal and ventral scutes run from the back of the head to the medial fins. They had heavy scales and small conical teeth. Their size varied by species: Knightia eocaena was the longest, growing up to10 inches, though most specimens are no larger than 6 inches.