Fig 2 b Distribution of types of sampling devices within the area of concentrated study. It 

 can be seen from this figure that most of the stations in the sand flat and nearshore region m 

 the southern Gulf and western side are grab samples. The majority of samples m the Tib^ron 

 region are shell dredge samples, the southern Gulf are trawl samples, the northern Gulf basm 

 are core samples, and most of the slope samples were taken by trawls. 



