The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
An indigenous species, found in estuaries, rivers, streams and lakes with easy access from the sea. In Cornwall, this species appears to prefer streams with sandy or stony beds as spawning sites. The larvae live buried in mud for 5-6 years prior to migrating to the sea. An apparently rare species, only recorded in east Cornwall (e.g. River Camel and River Tamar) where it can be relatively common in the spring. Listed in EC Habitats Directive in Annex IIa and Va, and in Appendix III of the Bern Convention. The River Lamprey is on the List of UK Priority Species.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.