Abstract:Study on the meiobenthos abundance and biomass of Changjiag (Yangtze River) estuary and its adjacent waters was based on the samples collected by R/V “No.2 Dongfanghong” in June, 2003. The dominant sediment type was poor sorted silt-clay(TY), with silt and clay content from 82.75% to 99.8%, median diameter (MD φ)from 7.57 to 8.92. This type was found in Zhejiang coastal waters where water depth was deeper than 30m.The second dominant sediment type was clay-silt(YT), with silt and clay content from 82.1% t...