fa عمومى General پژوهشي Research <span style="font-size:11pt"><span style="line-height:120%"><span style="tab-stops:4.5pt"><span style="font-family:Calibri,sans-serif"><span lang="TR" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times="">The goal of this study was to learn more about the zooplankton diversity in Keenjhar Lake. Keenjhar Lake is a tropical, man-made lake. It is around 120 kilometers, Outside of Karachi, at a distance of 24&deg;47&#39; N latitude and 68&deg;02&#39; E longitude (Ayoade and Aderogba, 2020). &quot;Keenjhar&quot; and &quot;Sunheri,&quot; or &quot;Green&quot; and &quot;Golden,&quot; respectively, two natural lakes were joined to create the lake. By blowing up the dividing hills in 1958, Keenjhar and Sunheri, two tiny depressions, were combined to create the &quot;Kalri Lake.&quot;. Zooplanktons are significant fauna in water bodies that operate as pollution bio-indicators and play a direct part in the food chain. There were a total of 9 different zooplankton species found. There were 06 Rotifera species, 01 Copepoda species, and 02 Cladocera species discovered among them. <i>Brachionus calyciflourus</i> (Pallas, 1834), <i>Brachionus bidentata</i> (Ahangar and Farooq, 2012), <i>Lecane leontina</i> (Aziz1 <i>et al</i>., 2014), <i>Trichotria tetractis</i> (Ehrenberg, 1830), and <i>Trichocerca pusilla</i> (Ehrenberg, 1830) were among the rotifers found (Jennings, 1903). <i>Moina micrura</i> (Lashari <i>et al</i>., 2021) was found in Copepoda, and <i>Ceriodaphnia quadrangular</i> (M&uuml;ller, 1785) and <i>Diaphanosoma birgei</i> <i>Ascomorpha saltans</i> (Lashari <i>et al</i>., 2021), were found in Cladocera (Korineck 1981). Rotifera species are the most common zooplankton species, indicating that the lake water is contaminated.</span></span></span></span></span></span></span><br> &nbsp; Rotifera, Copepoda, Cladocera, Diversity, Zooplankton and Thatta 17 22 http://injbir.com/browse.php?a_code=A-10-1-21&slc_lang=fa&sid=1 K.H. Lashari No Department of Fisheries and Aquatic Sciences, University of Sindh Jamshoro,Pakistan Z.A. Palh Yes Department of Fisheries and Aquatic Sciences, University of Sindh Jamshoro,Pakistan A.A. Shaikh No Department of Chemistry Government Collage University Hyderabad, Pakistan B.A. Bughio No Department of Zoology University of Sindh Jamshoro, Pakistan D. Khemtio No Department of Zoology University of Sindh Jamshoro, Pakistan D.B. Mashori No Department of Zoology Government Collage University Hyderabad , Pakistan K.H. Lashari No Department of Fisheries and Aquatic Sciences, University of Sindh Jamshoro,Pakistan