Scientific Identity
The accepted name is Entosphenus similis, with older accounts using Lampetra similis. Both combinations occur in the literature for this named fish. Keep the original name and locality when connecting historical records with the modern species account.
Adult Habitat and Feeding
Adults occur in substantial river channels and still-water areas such as lakes and impoundments. They feed parasitically on fish. This feeding stage distinguishes them from nonparasitic brook lampreys, even though the groups share an elongated, jawless appearance.
Size and Life History
The compiled maximum is 27 centimeters total length, compared with a common reference of 19.2 centimeters. The species reproduces once at the end of its adult life. A host-fish list should not be invented from records of another parasitic lamprey merely because their feeding mode is similar.
Distinguish Parasitic and Brook Forms
Lamprey appearance alone does not tell the complete feeding history. Keep the species identity attached to claims about adult feeding and habitat.
All Lakes With Klamath Lamprey
Browse lakes and reservoirs with documented Klamath Lamprey records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.
No published lakes are currently linked to this species in our confirmed records.