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Crustacea such as crabs, lobsters and shrimps are among the most valuable of marine crops in many parts of the world.The crabs are high prices in the markets due to their size and weight. Due to the microbial and parasitic diseases their market value has been getting down.Disease may have severe effects on the survival, particularly when crabs are impounded before sale.Some of the common diseases which affect larval and adult population of crabs are listed and described in detailed

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Dr. P. Soundarapandian has completed Ph.D in Centre of Advanced study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India in 1996. Subsequently he joined as UGC Research Associate and then as Assistant Professor in the above centre. In 2007, he was promoted as Associate professor.

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