called lamprey eels) are a group of jawless fish comprising the order Petromyzontiformes /ˌpɛtroʊmɪˈzɒntɪfɔːrmiːz/. The adult lamprey is characterized by a...

degenerate and have lost many characters over time "Introduction to the Petromyzontiformes". University of California Museum of Paleontology. Archived from the...

This list of freshwater fish recorded in Japan is primarily based on the IUCN Red List, which, for fish found in inland waters, details the conservation...

List of fish encountered in Swedish waters; both fresh water (lakes and streams) and in the marine salt water. The table denotes species native to Sweden...

The following list of known freshwater fish species, subspecies, and hybrids occurring in Washington state is taken from Wydoski and Whitney(2003). Some...

The state of Indiana is home to 208 species of fishes that inhabit its rivers, lakes, and streams that make up five watersheds. Indiana is the state with...

The following list of known freshwater fish species, subspecies, and hybrids occurring in the U.S. state of Idaho is taken from Wydoski and Whitney (2003)...

The list of fish in Austria consists of indigenous, and also introduced species. In total it consists of 98 species, including 5 which are extinct. The...

(Martens 1868) ), is a species of lamprey, a jawless fish in the order Petromyzontiformes. It inhabits coastal freshwater habitat types in the Arctic. Some...

The following list of freshwater fish species and subspecies known to occur in the U.S. state of Oregon is primarily taken from "Inland Fishes of Washington"...