Macroscopic and Postmortem lesions: (a) affected Tilaplia species showed paleness of gills and internal organs, (b) Gills of Mugil spp. infested with Caligus species, (c) Skin of Mugil spp. infested with Caligus elongatus, (d) Mugil specie showed adult isopod Livoneca redmaniiin branchial cavity, (e) D. labrax showed isopods attached to the operculum, (f) S. aurata showed congestion of gills.