SPECIES ID / Freshwater Fish of the Fraser ValleyLamprey Family (Petromyzontidae)Among the most ancient types of fish.Have no lower jaw and no bones; skeleton is made of cartilageBreed in freshwaterSpend 3 to 7 years as filter feeding larva (ammocoetes) in sand, silt or mud bottoms before transforming into adults and emerging into the stream.Some species spawn and die immediately after transformationOther species are parasitic; they attach to other fish and feed on body fluidsParasitic species live for one or more years as adults, usually in the Ocean, before returning to freshwater to spawn and die.Identification tipsLong eel-like formNo lower jaw; mouth is a round or oval openingAmmocoetes (larvae) have no eyesAdults have eyes, teeth visible in mouth, a single nostril on top of the head and 7 gill openings. Pacific Lamprey River Lamprey Western Brook Lamprey–––––– Primary Information Source: McPhail, J.D. 2007. The Freshwater Fishes of British Columbia. University of Alberta Press. Edmonton, Alberta.