“…Several studies have already demonstrated that sublethal exposure to SSRIs can significantly alter fish behaviour, physiology, and gene expression ( Hedgespeth et al, 2014 ; Kellner et al, 2015 ; Bisesi et al, 2016 ; Pelli and Connaughton, 2015 ; Weinberger and Klaper, 2014 ; Yang et al, 2021 ; Menon et al, 2020 ). This class of antidepressants has often been detected in water systems ( Fekadu et al, 2019 ; Burkina et al, 2015 ; Menon et al, 2020 ; Fernandez-Rubio et al, 2019 ; Silva et al, 2015 ; Sumpter and Margiotta-Casaluci, 2022 ), and their environmental levels are expected to increase significantly due to the negative impact of the COVID-19 pandemic on mental health ( Singh et al, 2022 ). SSRIs exert their therapeutic effect by blocking the serotonin reuptake transporter (SERT) in the presynaptic cell, thus inducing an increase in serotonin levels within the central nervous system (CNS) ( Salahinejad et al, 2022 ; Kellner and Olsén, 2020 ; McDonald, 2017 ).…”