“…Previous studies have demonstrated that EO from some plants can be used to enhance immunity in fish as well as killing of certain bacteria and parasites of fish (i.e. Acar, Kesbiç, Yılmaz, Gültepe, & Türker, ; Brum et al, ; Brum et al, ; Ngugi, Oyoo‐Okoth, & Muchiri, ; Sutili et al, ; Sutili, Murari, et al, ; Sutili, Velasquez, et al, ; Valladão et al, ; Valladão, Gallani, Kotzent, Assane, & Pilarski, ; Valladão et al, ). However, the usage of EO or their isolated compounds as dietary supplements in fish is still limited in scope and application.…”