“…Belyaev (1949), Remane &Schlieper (1958), andMcLusky &Heard (1971) pointed out that euryhaline species are well adapted to live in an environment with wide fluctuations in salinity, though their capability to prevent excessive changes in their internal environment by maintaining their blood hyper or hypo-osmotic to the medium. A series of experiments were carried out by Bhattacharya & Kewalremani (1972) and Bhattacharya (1982) to determine the reaction of adults and juveniles of its closer congener, M. orientalis to varying salinities, 1.8-35.0 at different temperatures. The salinity tolerance range of M. zeylanica in the backwaters (0 to 32.5) is more or less similar to the laboratory values found in M. orientalis (1.8-35.0) (Bhattacharya 1982).…”