The dietary supplementation of extracted oils from lemon (Citrus limon) (LEO) and/or sweet orange (Citrus sinensis) (OEO) peels in fish culture is initiated to be a potential factor for achieving welfare in Nile tilapia and improving growth performance. The results revealed that the extracted oils treated groups showed a marked increase in the following behavioural patterns such as feeding behaviour and swimming behaviour compared with chemically synthesized zinc oxide nanoparticles (ZnONPs) and control groups. While surfacing, body care, resting and aggressive behaviours with all their patterns were the lowest in the extracted oils treated groups than the other groups.