Phytoplankton biomass in surface water during Akad was studied to understand the dynamics of phytoplankton populations in the region. The study aimed to investigate the factors influencing phytoplankton growth and abundance in the surface water. The results showed that phytoplankton biomass varied significantly during the study period, with highest values recorded during the Akad period. The study provides valuable insights into the ecology of phytoplankton in the region and highlights the importance of understanding the dynamics of phytoplankton populations in the surface water.