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Shortnose cisco
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==Status== It is native to the [[Great Lakes]], formerly occurring in [[Lake Huron|Lakes Huron]], [[Lake Michigan|Michigan]], and [[Lake Ontario|Ontario]] in [[Canada]] and the [[United States]]. The [[IUCN]] considers ''C. reighardi'' to be [[Critically Endangered]] on the basis of plummeting population, caused by [[environmental degradation]]. The [[U.S. Fish and Wildlife Service]] and the [[Ontario|Province of Ontario]]'s Ministry of Natural Resources, however, consider the species already [[extinct]], on the basis that no specimen has been collected since 1985. The species was last confirmed present in Lake Ontario in 1964, in Lake Michigan in 1974, and in Georgian Bay in 1985. Predation by the [[alien species|alien]] [[sea lamprey]] (''Petromyzon marinus''), in combination with commercial [[overfishing]], has contributed to the fish's drastic reduction in numbers and possible extirpation. In 2024, it was announced that the species had been rediscovered in [[Lake Superior]], where it is not previously known to have lived.<ref name=":0" />
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