Previous Red Tide Occurrences

Click on the week for red tide occurrences during that period in the past month

> 2025/02/07 - 2025/02/14

> 2025/01/28 - 2025/02/07

> 2025/01/24 - 2025/01/28

> 2024/01/17 - 2025/01/24

 
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Overview of the period 2025/02/07 - 2025/02/14

    A red tide was sighted during the past week, the Inter-departmental Red Tide Working Group reported today (February 14).

    On February 13, staff of the Marine Department spotted a red tide at Tolo Harbour. The red tide still persists and no associated fish deaths have been reported as of today.

     A spokesman for the working group said, "The red tide was formed by Asterionellopsis glacialis, which is commonly found in Hong Kong waters and non-toxic."

    The Agriculture, Fisheries and Conservation Department (AFCD) urged mariculturists at Yim Tin Tsai, Yim Tin Tsai (East), Yung Shue Au and Lo Fu Wat 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.

Please click here to view the location of red tide sighted in Hong Kong waters.

Last update: 2025/02/14 noon

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Overview of the period 2025/01/28 - 2025/02/07

No red tide was reported during this week.

Last update: 2025/02/07 noon

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Overview of the period 2025/01/24 - 2025/01/28

    A red tide was sighted over the past few days, an inter-departmental red tide working group reported today (January 28).

    The red tide was spotted by staff of the Leisure and Cultural Services Department (LCSD) on January 24 at Clear Water Bay Second Beach, Sai Kung. The red tide has dissipated. No associated death of fish has been reported.

     A spokesman for the working group said, "The red tide was formed by Mesodinium rubrum, which is commonly found in Hong Kong waters and non-toxic."

    The Agriculture, Fisheries and Conservation Department (AFCD) urged mariculturists at Ma Nam Wat, Tung Lung Chau and Po Toi O 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.

Please click here to view the location of red tide sighted in Hong Kong waters.

Last update: 2025/01/28 noon

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Overview of the period 2025/01/17 - 2025/01/24

No red tide was reported during this week.

Last update: 2025/01/24 noon

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