Two red tides were sighted during the past week, the Inter-departmental Red Tide Working Group reported today (August 21).
          
     On August 18, staff of the Environmental Protection Department spotted two red tides at Repulse Bay Beach and Deep Water Bay Beach, Hong Kong Island, respectively. Both red tides have dissipated and no associated fish deaths have been reported as of today.
      
     A spokesman for the working group said, "Both red tides were formed by Phaeocystis globosa, which is commonly found in Hong Kong waters. According to literature overseas, the algal species can produce foam that may affect fish."
          
     The Agriculture, Fisheries and Conservation Department (AFCD) urged mariculturists at the Lo Tik Wan, Sok Kwu Wan and Po Toi fish culture zones to monitor the situation closely and increase aeration where necessary.
          
     Red tide is a natural phenomenon. The AFCD's proactive phytoplankton monitoring programme will continue to monitor red tide occurrences to minimise the impact on the mariculture industry and the public.

Ends/Friday, August 21, 2026
Issued at HKT 14:55

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