“…The major synthetic anesthetics used in aquaculture are 2-phenoxyethanol (Priborsky and Velisek, 2018), tricaine methanesulphonate (MS-222) and metomidate (Weber et al, 2009), benzocaine (Gökçek et al, 2016), etomidate (Rożyński et al, 2018), propofol and quinaldine sulphate (Priborsky and Velisek, 2018), and ketamine hydrochloride (Adel et al, 2016). Some plant originated essential oils such as basil and lemongrass (Limma-Netto et al, 2016), camphor (Pedrazzani and Neto, 2016), spearmint and lavender (Metin et al, 2015), Myrcia sylvatica and Curcuma longa (Saccol et al, 2017), Aloysia triphylla (Batista et al, 2018), Lippia alba (Souza et al, 2018) rosewood (Kizak et al, 2018), geranium (Can et al, 2018), and clove (Javahery et al, 2012;Cunha et al, 2015;Fujimoto et al, 2018;Mitjana et al, 2018) have recently been studied as potential anesthetic agents in aquaculture.…”