The larval tapeworms (Cestodes: Trypanorhyncha) isolated from some commercially important fish of Persian Gulf

A total of 180 fish samples from three commercially important teleosts (Epinephelus coioides, Euthynnus affinis and Thunnus tonggol fish) of Persian Gulf across Hormozgan coast were investigated for plerocercoid infestation, which were sampled from Jun 2017 to September 2017. The parasites were fixed, stained, mounted on to slides and identified. Epinephelus coioides was not infested. Following larval trypanorhynch species were isolated and identified: Callitetrarhynchus gracilis، Pterobothrium sp.and Grillotia erinaceous. Thirteen fish (7.2%) were infested with trypanorhynch plerocerci which were isolated from abdominal cavity and musculature. Based on the results, the highest infestatin and maximum intensity were demonstrated for C. gracilis in Thunnus tonggol fish. C. gracilis was isolated from the musculature of 3.33% of Thunnus tonggol fish.