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Comparison of HAB species in the seamount region of Xianbei (XB), Dongsha (DS), Xisha (XS), and the Pearl River Estuary (ZJK). (A) The presence (orange) and absence (blue) pattern of 19 HAB species in XB, DS, XS, and ZJK. (B) Venn diagrams of HAB species in XB, DS, and XS and in XB and ZJK.
