Wu & Shin (1997) found a high benthic similarity between the two sediment types (mud and sand) at each site. Nevertheless, Seiderer & Newell (1999) stated that there is no significant relation between the particle size distribution of the sediment and the distribution of benthic assemblages. According to Seiderer & Newell (1999), the correlation between all faunal assemblages and all sediment particle sizes was high, while correlations between communities with more specimens and the distribution of sediment particle size were respectively low. Reizopoulou and Nicolaidou (2004) found a decrease in the variety of the species and an increase in the abundance of a few species with an increase in confinement in lagoons situated in western Greece. We found a low correlation (rs=0.37; p˂0.05) between the particle size of sediment (μm) and the abundance (ind. m-2) for the sites. Wu & Shin (1997) reported that the amphipods Ericthonius sp. (20 individuals per m2) and Corophium sp. (16 individuals per m2) were dominant