The lucrative business of ornamental fish culture in West Bengal (Mainly in three districts-Howrah, North and
South 24 Parganas) are facing loses due to the invasion of different ecto- and endo-parasites. The present
study shows that the ornamental fish (Goldfish – Carassius auratus) are mainly affected with ecto-parasites
like Ichthyophthirius sp., Dactylogyrus sp., Gyrodactylus sp., Argulus sp. and endo-parasites like Procamallanus
sp. and Cucullanus sp. The intensity of infection is high in case of Ichthyophthirius sp. and the intensity of the
infection is high in summer months when the temperature is high or moderately high. In cooler months the
intensity of the infection is lower as because the parasites are unable to breed or scarcity of food particles.