Check the listing for details. A Grade Knightia eocaena Fossil Fish Green River Formation Wyoming. Listed at 48.00 USD. Our A grade Knightia eocaena are top quality. They were quarried in the Dempsey Quarry located near Kemmerer Wyoming. Knightia are a genus of 52 Million year old Fresh water herring. They once swam in the subtropical freshwater of Fossil lake. You will receive one A grade Knightia that is at least 3 inches in length, sometimes 4" or larger. The photos listed above should give you an idea of the quality range. Our fossils have minimal restoration (less than 20%). Wholesale discounts available with purchases of quantity. We have a huge selection of fossil fish, plants insects and other rare specimens. Please Contact us if you are looking for anything specific. We can definitely help you find what you're looking for at a reasonable price.