Determination of abundance of external parasites ofgoldfsh (Carassius auratus Linnaeus, 1785) in fshbreeding and pisciculture centers in Urmia city

Gold fsh or Pondfsh (Carassius auratus), is among the valuable ornamental fsh from Cyprinidae family, whichcompared to other ornamental fsh in the world, is sold extensively for low prices, especially in Nowrouz, in Iran.In this study, through colleting fsh from Breeding and Pisciculture centers in Urmia city and transporting themto the laboratory of parasitology of Urmia Islamic Azad University in special fsh transportation sacks, separationof external parasites from skin, fns, eyes, and gills was done. Among 92 investigated goldfsh, 56.52% werecontaminated with parasites. In this study 7 different genus were separated. The highest contamination percentagebelonged to species Ichthyophthirius multifliis and followed by Dactylogyrus spp. and protozoa Trichodina spp.Among single hosted trimatodes, Gyrodactylus spp. was also separate. Among multi hosted trimatodes, parasiteDiplostomum spathaceum was separated from the eye lens and parasite Diplozoon Nordman was seen in this studytoo which is the frst time to be reported in goldfsh in Iran. Among Fish lice parasites, genus Argulus foliaseuswas separated.