Northern Brook Lamprey fishing in Canada

Ichthyomyzon fossor

Documented at: 93 waters
Primary species at: 0 waters
Ideal water temp: 9°C
Active range: 4–15°C

Best northern brook lamprey waters today

Scored for 2026-09-14 from live weather, water temperature and this species’ own thermal range.

How to fish for northern brook lamprey

Northern brook lamprey are a small, non-parasitic native lamprey - unlike the sea lamprey, the adults don't feed on other fish at all; they live most of their lives as filter-feeding larvae (ammocoetes) burrowed in the silt of clean streams, then spawn and die without ever parasitizing anything. They're not remotely an angling target, but they're an important indicator species: because their burrowing larvae need clean, well-oxygenated stream sediment and years of stable habitat, their presence signals a healthy, unpolluted stream. On a location page, a native brook lamprey record is a positive sign of stream quality, and it shouldn't be confused with the destructive invasive sea lamprey.

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