PHUKET, THAILAND – A surge of jellyfish attacks struck popular Phuket beaches, forcing lifeguards into emergency response and sending several tourists to hospital, local rescuers said.
Hidden threat in turquoise water
The idyll at Patong Beach was broken in recent days when nearly transparent box jellyfish began injuring swimmers. The creatures were difficult to spot in the clear water, but their venom could be dangerous. “Most people first felt a burning, but in some cases it became serious quickly,” a lifeguard with the Patong Municipality said, describing cases that ranged from painful skin redness to severe allergic reactions that required urgent medical care.
First aid with vinegar but limitations remain
Rescue teams patrolled the shore equipped with bottles of vinegar, which is used to deactivate jellyfish stinging cells. “We treated stings immediately with vinegar to stop the spread of venom, but some patients had to be taken to hospital,” the lifeguard confirmed. Medical teams warned that vinegar is an important first aid step but may not be sufficient in strong envenomations.
Detached tentacles still pose danger
Authorities cautioned that even detached tentacles drifting in the water can continue to sting. They also highlighted the particular risk posed by Irukandji-type jellyfish, which can produce only mild initial symptoms that later escalate into potentially life-threatening conditions.
Portuguese man o’ war wash up at Kata Noi
The threat was compounded when Portuguese man o’ war—siphonophores often mistaken for true jellyfish—were found washed ashore at Kata Noi Beach. These organisms can have toxic tentacles up to 50 metres long and can sting even when washed up or apparently dead, the Department of Marine and Coastal Resources (DMCR) warned. Red warning flags were raised on July 15 to signal the heightened risk.
High season faces new challenge
The outbreaks came as Phuket entered its peak travel period, prompting concern that the incidents could deter visitors. Authorities stepped up beach patrols and monitoring of sea conditions. Lifeguards appealed to tourists to obey warning flags and follow instructions on the sand: a red flag meant no swimming, while yellow advised caution.
What swimmers should do
Experts advised that anyone stung should leave the water immediately, rinse the affected area with seawater (not freshwater), and then apply vinegar. Tentacle fragments should be removed carefully with tweezers, and emergency services should be called if severe symptoms develop.
The DMCR and local rescue teams remained on alert as they continued to monitor beaches and issue warnings to protect swimmers without disrupting vital tourism activity.