The present investigation has been conducted in the river Tawi of Jammu region, a major tributary of river Chenab from April 2015- December 2015 with an aim to work out the crustacean parasitic diversity of the water body. Two species viz. Labeo rohita and Tor putitora were selected to investigate their susceptibility to parasitic infections. A total of 42 Branchiuran parasites belonging to the genus Argulus could be retracted from the skin and gills of fish Labeo rohita. During the study period, a total of 140 fish specimens were collected, their number being 80 and 60 for Labeo rohita and Tor putitora respectively. Of the two, Tor sp. appears to be quite resistant to Argulus invasion since not a single specimen was found to be parasitized. The high prevalence of Argulus infection in Labeo suggests its low resistance to the parasitic infection. The prevalence of infection was calculated to be 66.67%. This is the first report of crustacean parasite Argulus from river Tawi of Jammu & Kashmir.
