in the present study, we reported infection with eighteen species of the genus dactylogyrus, belong to thefamily dactylogyridae from five breeder fish species, including common carp (cyprinus carpio), grass carp(ctenopharyngodon idella), silver carp (hypophthalmichthys molitrix), big head carp (hypophthalmichthysnobilis) and black carp (myelopharyngodon piceus) which introduced and imported to ...