Investigation on worm infestation of digestive tract in Persian gulf Cynoglossus bilineatus

Persian Gulf is very important economically, environmentally and politically that habitat of nearly 250 species of fish that a few of them have been studied parasitically. This study accomplished to investigate the worms of Cynoglossus bilineatus in district of Persian Gulf (Ahvaz). In this study during March to June 2016, 100 pieces of Cynoglossus bilineatus bought and transferred to laboratory. Separated parasites from different parts of fish stabilized in 70% alcohol and then identified with identification keys. In this survey, 82% of sampled fish had helminthic infestations. The most value of infestation regarding to two kinds of trematodes Treptodemoides fukenensis and Aphanuroides lethrini that the first species showed greater frequency. Reviews showed that two identified trematodes have not been reported before form this fish. There were also other nematodes including Capillaria, Procaecum and Raphidascaroides nipponensis in gastrointestinal tract, liver and abdominal cavity. The results of paersons correlation showed that there weren’t any significant correlation between the number of each identified trematodes and the weight and length of this fish.