A feeding trial was conducted to determine the effects of soy lecithin supplementation on produc- tion performance of juvenile channel catfish, Ictalurus punctatus (mean±SE; 5.8±0g). The basal diet consisted of a practical dietary formulation for channel catfish, containing 4.3% endogenous phospholipids (PL) from dietary ingredients, to which supplemental PL from soybean lecithin were added.