International Journal of Zoological Research1811-97781811-9786Academic Journals Inc.10.3923/ijzr.2017.83.92DashSwetapadma RoySanmitra 32017133Background and Objective: The aquatic insects belong to family Dytiscidae, often inhabiting the shores of salt or brackish water. The present study is focused on the members of family Dytiscidae beetles from water bodies of coastal area of Ganjam, connected directly to the Bay of Bengal via different rivers, rivulets and other water bodies adjacent to the estuaries present in the district. The purpose of the study was to invent and identify the specific species of estuarine coleopteran according to seasonal variation in estuaries of South coastal Odisha. Materials and Methods: Ganjam is a South coastal district of Odisha state, India located near the border of Andhra Pradesh. Four water-bodies were selected for the study. Pi-diagram was used to compare the percentage of aquatic insects collected from different sites. The aquatic coleopteran specimen comprises of 12 species, belonging to 07 genera of 04 subfamilies. Results: The 6 months study revealed the percentage of occurrence of Dytiscidae beetles with respect to other aquatic coleopteran families. Among the family Dytiscidae, Laccophilus parvulus (L. parvulus) and Hydaticus vittatus (H. vittatus ) dominated all of the four water bodies. Only few Dytiscidae of subfamily Dytscinae and Colymbetinae were found in saline water of Rushikulya. Conclusion: Four subfamilies namely Laccophilinae, Dytiscinae, Colymbetinae and Hydroporinae are chiefly represented in the present report. The study opened the opportunities for future taxonomic and diversity studies on the aquatic Coleoptera of Odisha state.]]>DeGuire, C.A.P., L.C. Jr. Ferrington and P. Kranzfelder,20132013Eyre, M.D. and G.N. Foster, 1989108355362Sanchez-Fernandez, D., P. Abellan, J. Velasco and A. Millan,200414465479Ribera, I. and G.N. Foster,199366175Mukhopadhaya, P. and S.K. Ghosh,20002000Vazirani, T.G.,19682221341Biswas, S., P. Mukhopadhyay and S.K. Saha,19951995Ghosh, S.K., P. Mukhopadhyay and S. Biswas,20002000Mukhopadhyay, P. and S.K. Ghosh,20072007Ghosh, S.K. and A.N. Nilsson,20123177Junk, W.J.,197753229238Vazirani, T.G.,1970493129Vazirani, T.G.,19771977Larson, D.J. and G. Pritchard,1974285363Ghosh, S.K., P. Das and B. Mitra,201631924Subramanian, K.A. and K.G. Sivaramakrishnan,20072007Subramanian, K.A. and K.G. Sivaramakrishnan,20072007Rahman, I., C. Sonowal and M. Nath,201367879Deepa, J. and C.A.N. Rao,20102010Ghosh, S.K. and V.D. Hegde,20132013