This project was designed to study the distribution und density of planktonic decapods (Natantia Groups) in Khur-e-musa creek. Sampling was carried out during the period of October 1998 till July 1999, and identified species were classified to two suborders. Suborder Penaeidae consisted of 2 families and 5 genera and suborder Caridea consisted of 6 families and 6 genera. The dominant genera were of family Sergestidae with 32.43% and Alpheus of family Alpheidae with 36.88%. It was observed during this study that spawning or these genera take place in the spring season
