CLOSED TEMPORARILY. Oneida Hatchery is located in the Village of Constantia in Oswego County, on the north shore of Oneida Lake. The hatchery was reconstructed in 1992. The rearing program is focused on walleye, and includes egg collections from Oneida Lake (200-300 million eggs/year), and stocking of millions of walleye fry and about 220,000 advanced walleye fingerlings (four to six inches). Experimental culture of rare or threatened fishes, such as round whitefish, lake sturgeon, and paddlefish, also occurs here. Annual fish production is about 6,000 pounds.