Abstract:The biodiversity analysis for free living marine nematodes was made based on two stations sampled in 1997, together with the data collected from 7 stations in 1986, one station from Jiaozhou Bay in 1995 and the other from Meizhou Bay in 1988. Total of 154 species belonging to 107 genera and 29 families were identified from the data collected from eleven stations. Species richness ( SR ), Shannon winner index (H ′), equitability ( J ) were used to measure and compare the biodiversity. The sequenc...