The distributional trends of percentage species content (as in ferred from living tests in the water column and of dead tests on the surface of Dottom sediment) were basically similar and suggesting that the southeastern part of the investigated area is characterized by strong, warm northward flowing Taiwan Strait Current which becomes gradually weaker in Haitan lsland’s eastern vicinitu where it meets the southward flowing Fujian-Zhejiang coastal current. The abundance distribution trend of empty and living tests were different. Empty tests were highly concentrated in the deep basin areas whereas living tests were more concentrated above the platform. This trend is related to the depositional environment of the area and to the complex current systems prevailing there. The scouring action of currents and low sedimentation rate account for the great accumulation of dead tests in the basin areas. The lesser abundance of dead tests over the platform areas is due to the high sedimentation rate causing dilution of tests.