Abstract
This study first time describes the free living marine nematodes present in the bank (sediment) of Ambrah Creek, Ghorabari, Thatta. The nematodes were sorted out from the soil samples during the period of 2003-2005. The results showed 4 orders, 9 families, 9 genera and 10 species of nematodes with various unidentified species. The orders were recognized as Enoplida (45.86%), Chromadorida (17.67%), Monhysterida (11.78%), Plectida (3.13%) whereas 21.55% nematodes remained unidentified. The hydrographic parameters, pH, temperature, salinity and dissolved oxygen were also measured from the creeks water. The combination of fine sand and clay size sediments of Ambrah Creek presented low diversity of free living nematode, while density of the nematode seemed to increase during winter months with respect to low temperature and high salinity.
