Fossil Fish found in Green River Shale.

(Diplomystus WY,USA)

The oldest vertebrates are fish. The first fish appeared in fresh water environments. All major groups of fish are still alive. Bony fish are now the most numerous. As abundant as fish are, they are relatively rare as fossils. Fish are so easily broken up after death that they make poor canididates for fossilization. Since fish are active swimmers, their fossils are likely to be found through a variety of rocks. Fossil bones may be abundant on bedding planes. Whole fish are more common in lake shales.

Pictures show the average size and quality you are sent. These are not the actual fish you will receive.
The fish fossils are highlighted with dye to acent the details of the fossil.