Deepwater Cisco - Extinction

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There are eight species of North American cisco, ray-finned salmonid fishes found in the Great Lakes, and of those, three are now extinct. The Deepwater cisco was observed only in Lake Huron and Lake Michigan and while there is some discrepancy in the taxonomy between the different species, it was one of the largest ciscoes. The fish was silvery in colour with hints of pink and purple and with a green or blue back. Due to its size, it was overfished into extinction. The species was last seen in Lake Michigan in 1952.