Fossilized Fish Wall HangingWhere To Buy Fossil Wall Hanging Online Take a look at this beautiful, fossilized fish wall hanging. It is an authentic, historic fossilized pair of fish skeletons in sedimentary rock from the Green River area of Wyoming. Fish fossils petrified remains are formed in many different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose, leaving the hard bones and