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A total of 14 specimens of Cobia Rachycentron canadum (L.) were caught from Iraqi marine waters during the period from October 2019 till May 2020. Two parasitic helminths (One species each of nematode and acanthocephalan) were isolated from alimentary canal of the cobia. These are the adults of Iheringascaris inquies (Linton, 1901) Deardorff & Overstreet, 1980 and Serrasentis sagittifer Linton, 1889. The record of these worms, from this fish, is considered as the first record in Iraq. Adequate description of both I. inquies and adult S. sagittifer from cobia for the first time in the Arabian Gulf is given.


Marine fish Nematoda Iheringascaris inquies Acanthocephala Serrasentis sagittifer Iraq

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Mizher, J. A. ., & Ali, A. H. . (2021). First Record of Two Parasitic Helminths from Cobia Rachycentron canadum (L.) (Carangiformes, Rachycentridae) from Iraqi Marine Waters. Basrah Journal of Agricultural Sciences, 34(2), 133–146.


  1. Ali, A. H. (2008). Taxonomy of helminth parasites in some marine and freshwater fishes and the relation of some of it’s with their final hosts in southern of Iraq. Ph. D. Thesis, College of Agriculture, University of Basrah, 336pp. (In Arabic).
  2. Ali, A. H., Adday, T. K., & Khamees, N. R. (2018). Catalogue of marine fishes of Iraq. Biological and Applied Environmental Research, 2, 298-368.
  3. Al-Mukhtar, M. A. (2011). Rachycentron canadum (Linnaeus, 1766) Rachycentridae in marine aquaculture. Iraqi Journal of Aquaculture 8, 1-14.
  4. Amin, O. M. (2013). Classification of the Acanthocephala. Folia Parasitologica, 60, 273-305.
  5. Amin, O. M., Heckmann, R. A., & Ali, A. H. (2018). The finding of Pacific transvenid acanthocephalan in the Arabian Gulf, with the description of Paratrajectura longcementglandatus n. gen., n. sp. from perciform fishes and emendation of Transvenidae. Journal of Parasitology, 104, 39- 50.
  6. Amin, O. M., Nahhas, F. M.; Al-Yamani, F., & Abu Hakima, R. (1984). On three acanthocephalan species from some Arabian Gulf fishes off the coast of Kuwait. Journal of Parasitology, 70, 168-170.
  7. Bannai, M. A. A. (2005). Description of two newly recorded Acanthocephala parasitizing halfbeaked fish Hemiramphus marginatus (Forsskål, 1774) in Khor Abdullah, Arabian Gulf, Iraq. Basrah Journal Veterinary Research, 4, 67-71.
  8. Bannai, M. A. A. (2018). Serrasentis sp. acanthocephalans parasite of some Iraqi marine water fishes with observation of the pathology, feeding habits and infection of Upeneus sulphureus fishes. Iraqi Journal of Science, 59, 2173-2178. eijs/index.php/eijs/article/view/559
  9. Barton, D. P., Smales, L., & Morgan, J. A. T. (2018). A redescription of Serrasentis sagittifer (Rhadinorhynchidae: Serrasentinae) from Rachycentron canadum (Rachycentridae) with comments on its biology and its relationship to other species of Serrasentis. The Journal of Parasitology, 104, 117- 132.
  10. Berland, B. (1984). Basic techniques involved in helminth preservation. Systematic Parasitology, 6, 242-245.‏
  11. Bhattacharya, S. B. (2007). Handbook on Indian Acanthocephala. Zoological Survey of India, Kolkata, 225pp.
  12. Bilqees, F. M. (1971). Parasites of the cat fish Arius serratus. I. Acanthocephala. Pakistan Journal of Zoology, 3, 57-65.
  13. Bilqees, F. M. (1972a). Serrasentis giganticus n. sp. (Acanthocephala, Rhadinorhynchidae, Serrasentinae), from fishes of Karachi coast. In: Bilqees, F. M., Saeed, R., Rehana, R., Khatoon, A. & Kaikabad, S. H. (Editors). Helminth parasites of some vertebrates chiefly from fishes of West Pakistan. Agricultural Research Council, Government of Pakistan, Karachj, Pakistan: 60-65.
  14. Bilqees, F. M. (1972b). Two new species of the genus Serrasentis (Acanthocephala: Rhadinorhynchidae) from some fishes of Karachi coast. Pakistan Journal of Science, 24, 121-124.
  15. Bilqees, F. M., & Khan, A. (2005). Two new helminth parasites from Pakistan, with redescription of the acanthocephalan Centrorhynchus fasciatum (Westrumb, 1821). Pakistan Journal of Zoology, 37, 257-263.
  16. Bruce, N. L., & Cannon, L. R. G. (1989). Hysterothylacium, Iheringascaris and Maricostula new genus, nematodes (Ascaridoidea) from Australian pelagic marine fishes. Journal of Natural History, 23, 1397-1441.‏
  17. Carpenter, K. E., Krupp, F., Jones, D. A., & Zajonz, U. (1997). The living marine resources of Kuwait, Eastern Saudi Arabia, Bahrain, Qatar and the United Arab Emirates. FAO species identification field guide for fishery purposes, FAO, Rome: viii + 293pp. + XVII pls.
  18. Deardorff, T. L., & Overstreet, R. M. (1981). Review of Hysterothylacium and Iheringascaris (both previously= Thynnascaris) (Nematoda: Anisakidae) from the northern Gulf of Mexico. Proceedings. Biological Society of Washington, 93, 1035-1079.‏
  19. Froese, R., & Pauly, D. (Editors) (2021). FishBase. World Wide Web electronic publication,, version 03/2021
  20. Gibbons, L. M. (2010). Keys to the nematode parasites of vertebrates: Supplementary volume. CAB Int., Wallingford, 416pp. esc=y
  21. Gibson, D., & Wayland, M. (2021). World List of marine Acanthocephala. Serrasentis Van Cleave, 1923. Accessed through: World Register of Marine Species at: on 2021-02-27
  22. Hartwich, G. H. (1974). Keys to genera of the Ascaridoidea. In: Anderson, R. C., Chabaud, A. G., & Willmott, S. (Eds.). CIH keys to the Nematode parasites of vertebrates, No. 2, Commonwealth Agricultural Bureaux, Farnham Royal, Bucks, England, 15pp.
  23. Hosseini, S. H., Alinezhad, S., Mobedi, I., Halajian, A., Karimi, E., Ahoo, M. B., & Yasemi, M. (2013). Study on the parasite of Pseudorhombus elevates, Psettodes erumei and Brachirus orientalis from the Persian Gulf, Iran. Iranian Journal of Fisheries Sciences, 12, 827-835.
  24. Huston, D. C., Cribb, T. H., & Smales, L. R. (2020). Molecular characterisation of acanthocephalans from Australian marine teleosts: proposal of a new family, synonymy of another and transfer of taxa between orders. Systematic Parasitology, 97, 1-23.
  25. Kardousha, M. M. (2005). Helminth parasite larvae collected from Arabian Gulf fish. 4. Description of four larvae including two metacercariae, one didymozoid and one acanthocephalan from Emirati coasts. Arab Gulf Journal of Scientific Research, 23, 23-27.
  26. Khatoon, S., & Bilqees, F. M. (2007). Description of new acanthocephalan Serrasentis niger (Rhadinorhynchidae: Serrasentinae) from the fish Stromateus niger of Karachi coast. Proceedings of Parasitology, 44, 69-74.
  27. Liao, I. C., Huang, T.-S., Tsai, W.-S., Hsueh, C.-M., Chang, S.-L., & Leaňo, E. M. (2004). Cobia culture in Taiwan: current status and problems. Aquaculture, 237,155-165.
  28. Luque, J. L.; Amato J. F. R., & Takemoto R. M. (1995). Helminth larval stages in Orthopristis ruber and Haemulon steindachneri (Osteichthyes: Haemulidae) from the coast of the State of Rio de Janeiro, Brazil. Revista Brazileira de Biologia, 55, 33-38.
  29. Malhotra, A., Jaiswal, N., Malakar, A. K., Verma, M. S., Singh, H. R., Lakra, W. S., Malhotra, S. K., & Shamsi, S. (2012). The morphology and genetic characterization of Iheringascaris goai n. sp. (Nematoda: Raphidascarididae) from the intestine of the silver whiting and spotted catfish off the central west coast of India. Journal Helminthology, 86, 353-362.‏
  30. Mhaisen, F. T., Ali, A. H., & Khamees, N. R. (2018). Marine fish parasitology of Iraq: A review and checklists. Biological and Applied Environmental Research, 2, 231-297.
  31. Mohamadain, H. S., & Adel A. (2015). Light and scanning electron microscopy on Serrasentis sagittifer Linton, 1889. (Acanthocephala): Paleaecanthocephala: Rhadinorhynchidae) infecting the common sea bream in Egypt. Journal of the Egyptian Society of Parasitology, 45, 23-28.
  32. Moravec, F. (1994). Parasitic nematodes of freshwater fishes of Europe. Academia Prague, and Kluwer Academic Publishers, Dordrecht: 473pp.
  33. Moravec, F., Yost, J., & de Buron, I. (2012a). New data on the morphology of Iheringascaris inquies (Linton, 1901) (Nematoda: Anisakidae), a specific parasite of the marine fish Rachycentron canadum (Linnaeus), as revealed by SEM. Folia Parasitologica, 59, 315-318.‏
  34. Moravec, F.; Taraschewski, H., Appelhoff, D., & Weyl, O. L. (2012b). A new species of Hysterothylacium (Nematoda: Anisakidae) from the giant mottled eel Anguilla marmorata in South Africa. Helminthologia, 49, 174-180.‏
  35. Nhu, V. C., Nguyen, H. Q., Le, T. L., Tran, M. T., Sorgeloos, P., Dierckens, K., Reinertsen, H., Kjørsvik, E., & Svennevig, N. (2011). Cobia Rachycentron canadum aquaculture in Vietnam: recent developments and prospects. Aquaculture, 315, 20-25.‏
  36. Palm, H. W. (2004). The Trypanorhyncha Diesing, 1863. PKSPL-IPB Press, Bogor, x+710 pp.
  37. Petter, A. J., & Sey, O. (1997). Nematode parasites of marine fishes from Kuwait, with a description of Cucullanus trachinoti n. sp. from Trachinotus blochi. Zoosystema, 19, 35-59.‏
  38. Smales, L. R. (2014). Micracanthorhynchina and Serrasentis (Acanthocephala: Rhadinorhynchidae) from Australian fishes, with the description of a new species. Transactions of the Royal Society of South Australia, 138, 92-97.
  39. Smales, L. R. (2015). Acanthocephala. 317-336. In: Schmidt-Rhaesa, A. (Ed.) Handbook of Zoology: Gastrotricha, Cycloneuralia and Gnathifera. Volume 3. Gastrotricha and Gnathifera. De Gruyter, Berlin: 354pp.
  40. Tavakol, S., Amin, O. M., Luus-Powell, W. J., & Halajian, A. (2015). The acanthocephalan fauna of Iran, a check list. Zootaxa, 4033, 237-258.‏
  41. Van der Laan, R., Fricke, R., & Eschmeyer, W. N. (Editors.) (2021). ESCHMEYER'S CATALOG OF FISHES: CLASSIFICATION. ( Electronic version accessed 1st February 2021.
  42. Verweyen, L., Klimpel, S., & Palm, H. W. (2011). Molecular phylogeny of the Acanthocephala (class Palaeacanthocephala) with a paraphyletic assemblage of the orders Polymorphida and Echinorhynchida. PLoS One, 6, e28285.‏
  43. WoRMS (2021). Iheringascaris Pereira, 1935. Accessed at: on 2021-02-27

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