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Lampetra ayresii is a species of lamprey in the family Petromyzontidae.It is also called the river lamprey or western river lamprey.It is found in the eastern Pacific, specifically from Tee Harbor, Juneau in Alaska to the Sacramento–San Joaquin drainage in California, USA.
Common Name Scientific Name Image Native Non-Native Notes Pacific Lamprey: Lampetra tridentata: River Lamprey: Lampetra ayresl: Pit-Klamath Brook Lamprey: Lampetra lethophaga
Pacific lamprey numbers have greatly decreased due to human infrastructure. Damming rivers, channelization, and declines in water quality have impacted pacific lamprey habitat and their ability to live. [11] However, restoration of rivers and streams in Southern California has re-established the fish in portions of their historic southern range.
Adult carnivorous lampreys are the most well-known species, and feed by boring into the flesh of other fish (or in rare cases marine mammals) to consume flesh and/or blood; [9] but only 18 species of lampreys engage in this predatory lifestyle [10] [11] (with Caspiomyzon suggested to feed on carrion rather than live prey [9]).
The Kern brook lamprey (Lampetra hubbsi) is a species of lamprey in the Petromyzontidae family endemic to the United States. [4] It is found on the east side of San Joaquin Valley, in lower Merced, Kaweah, Kings, and San Joaquin rivers in California . [ 1 ]
An adult lake lamprey is dark blue or dark brown with a lighter belly, and the body is 11.8-27.3 cm in length. The lamprey's disc-like mouth is filled with sharp teeth. The Vancouver lamprey has eyes on the top of its head, two dorsal fins, a caudal fin, and an anal fin. [6]
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Pacific hagfish at 150 m depth, California, ... The following hagfish and lamprey phylogeny is an adaptation based on the 2019 work of Miyashita et al. [69]