This dataset contains morphological information for Ciscoes (Coregonus, subgenus Leucichthys) collected from the Great Lakes as part of the "Great Lakes Cisco Project". The project was initiated in 1950 by Stanford H. Smith, who was a Fishery Research Biologist in the then U.S. Bureau of Commercial Fisheries. The dataset includes 16 morphometrics (linear measurements) and one meristic (count of gill rakers) for Ciscoes, together with biological data (i.e., length, weight, sex, and maturity), sampling location, and date of collection. Consult Koelz (1929) and the "Morphology of Ciscoes" section in Eshenroder et al. (2016) for descriptions of how measurements and counts were made in the then "Ann Arbor Laboratory" of U.S. Bureau of Commercial Fisheries. References Eshenroder, R. L., P. Vecsei, N. E. Mandrak, D. L. Yule, O. T. Gorman, T. C. Pratt, D. B. Bunnell, and A. M. Muir. 2016. Ciscoes (Coregonus, subgenus Leucichthys) of the Laurentian Great Lakes and Lake Nipigon. Great Lakes Fishery Commission Miscellaneous Publication 2016-1, Ann Arbor, Michigan. Koelz, W. N. 1929. Coregonid fishes of the Great Lakes. Bulletin of the United States Bureau of Fisheries, 43(2), 297–643.