ABSTRACT JOSE C. BANGSAL JR., ALJON M. BUSTOS and MARK GLENN M. MUSNGI. August 2022. GROWTH PERFORMANCE OF COBB BROILER FED DIET SUPPLEMENTED WITH VARYING LEVELS OF GLORIA TILAPIA AND JANITOR FISH. Bachelor of Science in Agriculture major in Animal Science. Pampanga State Agricultural University, PAC, Magalang, Pampanga. Advisers: RICARDO D. HERNANDEZ, M.S.A The objective of the present study was to evaluate the interactive growth performance of Cobb broiler fed diet supplemented with varying levels of gloria tilapia and janitor fish. A total of 180 heads of broiler, day-old undersexed Cobb 500 chicks that were obtained from the Broiler Farm in San Matias, Sto Tomas, Pampanga, was used in the study and raised in an open-sided, conventional type of housing that was oriented in an east-west direction. The birds were divided into eighteen (18) allocated into respective treatment replications after (15) days. Black chin Tilapia (Gloria Tilapia) and Janitor Fish were used in the study as feed additives. Treatments were manually mixed with broiler feeds and were fed on an ad libitum basis. The results of the study showed that the supplementation of Gloria Tilapia and Janitor Fish, shown significant effect (P<0.05) to the total body weight gain, feed consumption, and average daily gain except feed conversation ratio compared to control treatment.