A defatted rice bran (DRB) product was evaluated as a potential ingredient in practical channel catfish (lctalurus punctatus) feeds by partial substitution of control feed ingredients. Fingerlings in aquaria were fed I of 4 feeds: 0 (control) - a standard commercial feed, 1 - DRB replaced regular rice bran, 2 - DRB replaced some com, soybean meal, and rice bran, 3 - DRB replaced some com, fish meal, and rice bran. There were no significant (P > 0.05) differences in survival or feed conversion among fish fed the 4 feeds, but fish fed feed 2 had a greater weight gain than fish fed feed 0 or feed 3. Feeds 0 and 2 were then each fed in 3 O.04-ha ponds stocked with fingerling catfish from June 1987 to November 1987. There were no significant differences (P > 0.05) in growth, survival, or feed conversion between fish fed either feed. Defatted rice bran appears to be an acceptable feedstuff for use in catfish feeds.