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BiologyA short-lived, non-parasitic freshwater brook lamprey which occurs in clean, cold water usually near springs in the foot-hill zone, over muddy or sandy bottom (Ref. (Ref. 12320). Ammocoetes inhabits detritus-rich sands or clay sediments (Ref. 59043). They are filter bottom-feeders. Metamorphosis takes place after 4.5 years (Ref. 12320). Reproduction takes place from January to June. Its existence is threatened by habitat destruction and water abstraction (Ref. 26100).