Fish are frequently exposed to a variety of pathogenic agents
in the aquatic environment, causing mixed infections. In the 
present study; we investigated the prevalence of parasitic 
crustaceans and bacterial pathogens of fish collected from 
Ismailia governorate, Egypt during the period from March 
2022 to February 2023. A total number of 400 fishes 
belonging to four genera were collected randomly. 
Parasitological examination showed a total of three crustacean 
species were isolated from the gills, skin, and fins of different 
fish spp. (Levonica redmani, Caligus and Lernanthropus 
species) in addition the bacterial examination revealed the 
presence of Psedumonas aeruginosa.