Collection: Bony Fish

Bony fish (or Osteichthyans) is the prominent group of fish today. They are divided into two major subgroups – ray-finned fish, including such living types as herring and salmon, as well as more primitive types such as sturgeon and gars, and lobe-finned fish, consisting of coelacanths, lungfish, and Rhipidistians, the ancestor of the tetrapods. Most Mazon Creek fossil specimens are small in size – 50 mm or less – and probably are larval or juvenile forms as evidenced by the presence of yolk sacs.