Jackbean (Canavalia ensiformis) is an under-utilized legume with crude protein content and amino acid profile that make it a potential ingredient in the tropics as substitute for fish meal in fish diets. This study assesses the potentials of Jackbean seed meal (JBSM) for partial replacement of fish meal in diets of Clarias gariepinus. Fishmeal in control diet was replaced progressively (10%, 20% 40% and 60%) by raw JBSM, 30-and 60-minute boiled JBSM. Test fish in each tank were fed 3% of their biomass twice daily for 56 days. Fish fed control diet had the best performance (Specific growth rate 1.6; Feed conversion ratio 1.88: Protein efficiency ratio 1.74). Specific growth ratio and PER of fish groups fed test diets were inversely related to the dietary levels of JBSM. The same trend applied to protein and fat contents of the fish carcass. Feed conversion ratio however had the reverse trend. Fish fed diets with up to 20% fishmeal substituted by 60 minute boiled JBSM had protein content similar to those fed the control diets (P