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Three separate studies, involving a total of 48 ponds, were conducted to determine the value of certain agricultural forages and by-products as supplemental feed for crawfish. In Study 1, crawfish were grown in replicated ponds with four different treatments; namely bahiagrass hay, rice hay, inorganic fertilizer, and natural vegetation (control ponds). Greatest average yield of harvestable crawfish was obtained from the rice hay and bahiagrass hay. Crawfish production in fertilized and control ponds was much lower. In Study 2, crawfish were grown in replicated ponds with four different treatments; namely sugarcane bagasse + inorganic fertilizer, sugarcane bagasse + chicken manure, sugarcane bagasse only, and chicken manure only. In Study 3, an experimental design similar to Study 2 was used. Some agricultural forages and by-products show promise as supplemental feed for crawfish. Fed alone they do not appear to provide suitable forage for crawfish.