One of the man-made wetlands and natural inland waters in Qatar were investigated for the aquatic fauna from September 2010 up to June 2013 during random intervals. The investigations have revealed 24 species of macroinvertebrates: one Rotifer, 3 gastropods, one Notostracan, 2 Ostracods, 2 Copepods, one Cladoceran, one Odonatan, 2 Hemipterans, 5 Coleopterans and 6 Dipterans. Except Gastropods, Ostracods, Copepods and the Odonatan, all the remaining taxa are recorded for the first time in Qatar. Surprisingly, these man-made wetlands have created a favorable habitat for enriched numbers of aquatic organisms in such arid desert.