Cladoselache is an extinct genus of shark-like chondrichthyan from the Late Devonian (Famennian) of North America. Growing to several meters in length, it is considered to have been a fast-moving and fairly agile marine predator due to its streamlined body and deeply forked tail. Cladoselache is one of the best known of the early chondrichthyans in part due to an abundance of well preserved fossils, discovered in the Cleveland Shale on the south shore of Lake Erie. In addition to the skeleton, the fossils were so well preserved that they included traces of skin, muscle fibers, and internal organs, such as the kidneys.^[1]