Genuine Green River Fossil Fish – Knightia eocaena

Travel back approximately 50 million years with this authentic Knightia eocaena Fish Fossil from the famous Green River Formation near Kemmerer, Wyoming. Dating to the Eocene Epoch, this beautifully preserved fossil captures a remarkable moment from an ancient freshwater ecosystem that flourished long before humans ever existed.

During the Eocene, the Green River region was covered by vast subtropical lakes surrounded by lush vegetation and abundant wildlife. Knightia was one of the most common fish species inhabiting these calm freshwater environments, swimming in large schools through warm waters and feeding on small aquatic organisms. Closely related to modern herring and sardines, Knightia played a vital role within this prehistoric lake ecosystem.

When this fish died, it drifted to the quiet lakebed where it was rapidly buried beneath ultra-fine sediment. Low oxygen conditions prevented scavenging and decay, preserving delicate details such as fins, scales, and skeletal structures with extraordinary clarity. Over millions of years, these sediments compressed and hardened into the fine-grained limestone that made the Green River Formation internationally renowned for its exceptional fossil preservation.

Today, the Green River Formation is regarded as one of the world’s most scientifically important fossil localities, preserving an incredibly detailed record of prehistoric freshwater ecosystems. Fossils from this region help scientists better understand ancient climates, lake environments, and the evolution of early freshwater life while offering collectors a breathtaking window into Earth’s distant past.

This authentic fossil fish specimen is more than a collectible — it is a beautifully preserved snapshot of life from an ancient Eocene lake preserved in stone for millions of years.

The Details You Need — Forever Gems Fossil Facts

✓ SPECIMEN: Fossil Fish
✓ SPECIES: Knightia eocaena
✓ AGE: Eocene Epoch (Approx. 50 Million Years Old)
✓ FORMATION: Green River Formation
✓ LOCATION: Near Kemmerer, Wyoming, USA
✓ SPECIMEN SIZE: 129mm x 81mm x 12mm Approximately
✓ FISH SIZE: 56mm x 27mm Approximately
✓ WEIGHT: 207 grams
✓ PRESERVATION: Natural fossil fish preserved in fine-grained limestone
✓ AUTHENTICITY: Genuine prehistoric freshwater fossil specimen
✓ DISPLAY: Ideal for fossil collections, educational displays, and natural history décor

Own a perfectly preserved survivor from the ancient lakes of Wyoming and let this remarkable Knightia fossil bring the story of prehistoric freshwater life into your collection.