“…Parasites become a concern only when they affect a fish species of interest, causing adverse effect on the economy, recreational activity or commercial fishery (Iwanowicz, ; Reed, Basson, & As, ; Santos et al, ). The damaging effect of parasites is noticed when changes occur within the host, such as physiological (cell proliferation, immunosuppression, altered growth, detrimental behavioural responses), or mechanical damage (fusion of gill lamellae, epithelial desquamation, hypertrophy, tissue replacement) (Barber, Hoare, & Krause, ; Buchmann, ; Buchmann & Lindenstrøm, ; Santos et al, ) and reproductive interference (Al‐jahdali & Hassanine, ).…”