A Taheri Mirghaed - Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
M Ghadam - Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
H Ebrahimzadeh Mousavi - Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
M Soltani - Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
P Shohreh - Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
H Rahmati Holasoo - Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
I Mobedi - Department of Parasitology, Faculty of Hygiene, Tehran University of Medical Sciences, Tehran, Iran
A Banitalebi - Department of Aquatic Animals Health & Diseases, Hormozgan Veterinary Organization, Bandar Abbas, Iran

Pick handle barracuda (Sphyraena jello) ) is one of the most important commercial species in the Persian Gulf. In order to investigate prevalence and intensity of nematoda, 150 S. jello  from three sites (Khuzestan, Bushehr and Hormozgan provinces) of the Iranian coast of the Persian Gulf were monthly investigated in the period 2012-2013. The nematodes belonging to the genus Hysterothylacium (family Raphidascarididae) were isolated from the abdominal cavity and digestive tract with a prevalence of 12% and mean intensity of 4.8. Intensity of infestation was increased with size of the host (P<0.05). This study is the FIrst report of presence of the third and fourth- stage of an unreported type of the third and fourth- stage of an unreported type of Hysterothylacium  larvae in S. jello  from the Persian Gulf.

Sphyraena jello, Hysterothylacium sp., nematodes, Persian Gulf.