Based on three bottom trawl surveys carried out in spring (June), 2011, crab species composition, weight density and individual density distribution, dominant species, and community characteristics were analyzed by analysis of variance, linear regression, cluster analysis, and non-metric multidimensional scaling. Thirteen crab species, belonging to 7 families of 4 orders in 1 class were sampled. Of these, four were eurythermal and eurysaline, four were hyperthermal and eurysaline, two were hyperthermal and hysaline, and three species were of uncertain ecotypes. Weight density Aprilas did the number abundance density indices) differed significantly betweenhe Margalef richness index (were negatively correlated (<0.05). During spring in the study area, the non-economic mid-minitype crab species occupied the D increased with increase in sea. In addition, most dominant species density in this can be used as a basis for identifying the ecotype function zone and important fisheries waters.