Range and Identity
Lampetra richardsoni is recorded in Pacific drainages from Alaska toward the Umpqua system. It should remain distinct from parasitic lampreys even where their ranges overlap. An eel-like outline does not establish the same diet or life cycle as a true eel.
Habitat and Behavior
Larvae inhabit fine sand or mud and filter small organic material, including diatoms and other tiny organisms. Adults use clear, cool stream settings with gravel or rock for reproduction. These different stages explain why one bottom type does not describe the entire life history.
Food and Life History
The upper reference is 17.3 centimeters total length. Adults do not feed. Nest construction and spawning can involve multiple individuals, while a particular month reported in one region should not be imposed on every population. No independent maximum mass is supplied.
Field Note
Include life stage in habitat records. A buried larva and a spawning adult can occupy very different positions in the same drainage without representing different species or conflicting observations.
All Lakes With Western Brook Lamprey
Browse all lakes and reservoirs with confirmed Western Brook Lamprey records in our database, listed alphabetically.
No published lakes are currently linked to this species in our confirmed records.