Feed effectors can improve palatability of shrimp feed formulated with byproducts or high levels of plant proteins. Additionally, recent data suggests that feed effectors can positively influence shrimp survival, especially under stressful conditions. The present work evaluates the use of a chemosensory feed effector on the feeding behavior, growth performance, and salinity stress tolerance of juvenile Litopenaeus vannamei. Nine diets were formulated to contain either poultry meal (6%), or fishmeal (6% or 12%) as animal protein source, with feed effector supplemented at 0, 0.1, and 0.2%. The various diets were offered to naïve and non-naïve shrimp to evaluate feed consumption. Concurrently, shrimp feeding behavior was monitored using passive acoustic monitoring , a non-invasive technique that allows to study shrimp behavior without stressing the animals. Afterwards, a 42-days growth trial followed by a salinity stress test were performed to assess animal growth, survival, and stress tolerance as a response to the experimental diets . Results of the present study indicate significant positive relationships between the number of clicks and feed consumed after 30 minutes (p <0.001, r=0.46 to 0.69). Additionally, the shrimp consumed poultry meal-based diets similarly to the fishmeal-based diets, only when supplemented with the feed effector. Interestingly, no significant differences were observed in terms of final biomass, final average individual weight, weight gain, FCR, or survival of shrimp offered the various test diet (p>0.05) . The salinity stress test indicated significantly better survival when offered diets supplemented with the feed effector, regardless of the level of inclusion. Results of the present work suggest that supplementing the feed effector to shrimp diets improves palatability and shrimp acceptance of diets formulated with poultry meal as sole animal protein source, as well as improves shrimp tolerance to salinity stress .