Batubara, L.W., Sinaga, H. and Hutagalung, D.I.D. 2024. Abundance and Diversity of Phytoplankton in Mangrove Forest Waters of Aek Horsik Village, Central Tapanuli. Journal of Coastal and Ocean Sciences. 5, 2 (May 2024), 94-100. DOI:https://doi.org/10.31258/jocos.5.2.94-100.