Research Journal of Parasitology1816-4943xxxx-xxxxScience International10.3923/jp.2007.45.50Sphyraena obtusata]]>RavichandranS. BalasubramaninT. KannupandiT. 1200721The incidence of parasitic isopods in the fish Sphyraena obtusata was studied. The reduction in gill raker count and gill surface area was observed as a function of infestation was found to be statistically significant. Maximum reduction in respiratory surface area was observed in Ist gill arch (10.7%) and minimum (9.2%) in the IIIrd gill arch. The percentage reduction of surface area in the IInd and IVth gill arches was 10.2 and 9.7, respectively. The infestations such as, hemorrhagic lesions, anemia; encapsulation; inflammation and penetration of dactylus usually pressure atrophy often accompanied by the presence of larger parasites. This may lead to huge economic losses in commercial species of fish.]]>Bowman, T.E., 1960Lironeca puhi nsp isopoda cymothoidae parasite of the hawaiian moray ee Gymnothorax eurostus Abbott.]]>I8291Cuyas, C., J.J. Castro, A.T. Santana Ortega and E. Carbonell,2004Serranus atricauda pisces serranidae through the presence of Ceratothoa steindachneriisopoda cymothoidae) and Pentacapsula cutaneamyoxoa entacapsulidae) in the canary islands. ]]>68159163Grutter, A.S., 2003Gnathia sp. crustacea isopoda from the great barrier reef and its implications for fish cleaning behavior. ]]>259295302Kabata, Z., 2003pp: 265- 271pp: 265- 271Overstreet, R.M., 1978pp: 140pp: 140Ramestand, B.,197954423448Ravichandran, S., A.J.A. Ranjith Singh, N. Veerappan and T. Kannupandi, 1999 Joryma brachysoma on Illisha melastoma from Parangipettai coastal waters Southeast coast of India.]]>595101Ravichandran, S., P. Soundarapandian and T. Kannupandi,2000Epipenaeon ingens Nobili parasitized on Penaeus monodon from Parangipettai coastal environment.]]>197378Ravichandran, S., A.J.A. Ranjith Singh and N. Veerappan, 2001Chirocentrus dorab off Parangipettai coastal waters.]]>80101102Romestand, B., M. Janicot and J.P. Trilles,197752171180Stephenson, A.B.,197613167173Williams, E.H. Jr. and L.B. Williams, 1985Cuna insularis from the gill chamber of the sergeant major Abudefduf saxatilis linneaus in the West Indies. ]]>71209214