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...

There are roughly 135 recorded species of fish in the U.S. State of Kansas. This list is an amalgamation of the works Cross & Collins books Handbook of...

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...

There are approximately 92 species of fish that have been recorded in the U.S. State of Vermont. 11 of which are introduced. The main source for this list...

The U.S. state of Tennessee has a uniquely diverse array of fresh-water fish species, owing to its large network of rivers and creeks, with major waterways...

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...

lacking. Research also indicates that some lampreys, members of the Petromyzontiformes, may be pentachromats. Invertebrates can have large numbers of different...

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