Blue walleye

• abstract: The blue walleye (Sander vitreus glaucus), also called the blue pike, was a subspecies of the walleye that went extinct in the Great Lakes in the 1980s. Until the middle of the 20th century, it was a commercially valuable fish, with about a half million tonnes being landed during the period from about 1880 to the late 1950s, when the populations collapsed.

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