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Red tides sighted
Friday, February 10, 2023

Two red tides have been sighted over the past week, the Inter-departmental Red Tide Working Group reported today (February 10).

The red tides were spotted by staff of the Leisure and Cultural Services Department at Ting Kau Beach, Tsuen Wan, and Silverstrand Beach, Sai Kung, today. The red tides still persist and no associated fish deaths have been reported as of today.

A spokesman for the working group said, "Both red tides were formed by Noctiluca scintillans, which is commonly found in Hong Kong waters and is non-toxic."

The Agriculture, Fisheries and Conservation Department (AFCD) urged mariculturists at Ma Wan, Ma Nam Wat, Kau Sai, Kai Lung Wan, Tai Tau Chau, Leung Shuen Wan and Tiu Cham Wan 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.