Abstract:The Tidal Link is constructed to dispose off the drainage water from Nawabshah, Sanghar, Mirpurkhas and Badin districts to Shah Samando Creek. It is connected with brackish water lakes belonging to Run of Kuch and Shah Samando Creek of Arbian Sea in District Badin. These lakes were examined in terms of biological life and water quality. The Sonahro and Mehro are saline lakes rich in primary productivity with 114 species of algae, 17 species of aquatic plants and five species of fresh water fish. Among the fishes Cirrhinus mirgala, Channa marulia, Notopterus notopterus, Oreochromis mossambicu's, Rita rita, Wallagoattu were identified and all are commercially important. Water quality revealed , value of pH as 7.7-8.0, conductivity, 2.74-9.97 mS/cm and salinity 1.5-5.9 ppt with a number of nutrients. Pateji and Cholari are brackish water lakes. Majority of algal flora belong to Bacillarophyta, Cyanophyta and Enteromorpha species of Chlorophyta. Beside, 28 species of fish and 8 species of shrimps were identified.

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