International Journal of Zoological Research1811-97781811-9786Academic Journals Inc.10.3923/ijzr.2008.113.118SoundarapandianP. John SamuelN. RavichandranS. KannupandiT. 2200842In this study, the distribution of crabs in Pichavaram was recorded from December 2001 to November 2002 at monthly intervals. The species present on the substratum and on the vegetation area were recorded in quadrant each measuring 1 m2. There are about 36 crabs species are distributed in Pichavaram mangrove environment. Crabs belonging to the family Grapsidae and Ocypodidae are most dominant forms. Substrate suitability; effects of tidal inundation and distribution of mangrove plants were the possible factors that could influence zonation and abundance of the crabs in the Pichavaram mangroves. The reason for depletion of crabs and their conservation measures are also discussed.]]>Chakaraborthy, S.K. and A. Choudhury,199234189194Joel, D.R., P.J.S. Raj and R. Raghavan,198695437446Jones, D.A.,1984198489-10989-109Kathiresan, K. and B.L. Bingham,20014081251Kathiresan, K.,20032003Krishnamurthy, K. and M.J.P. Jayaseelan,198397985Muniyandi, K.,19861986Rajendran, N.,19971997Rajendran, R.B. and A. Subramanian,199713223236Ramesh, A., S. Tanabe, K. Kannan, A.N. Subramanian, P.L. Kumaran and Tatsukawa,1992232636Sethuramalingam, S.,19841984Sethuramalingam, S. and S. Ajmalkhan,19911st Edn.,Subramanian, A.N.,20002000Williams, A.B.,19841st Edn.,pp: 550pp: 550