The Phuket Lifeguard Service first reported the finding on May 30, identifying the creatures as Blue Buttons (Porpita porpita), a floating marine hydrozoan commonly found on the ocean surface.
According to lifeguards, Blue Buttons can be recognised by their distinctive dark blue circular floating disc surrounded by short branching tentacles that resemble a flower. They are often mistaken for the more venomous Bluebottle, or Portuguese Man o’ War, but differ in appearance as they lack the Bluebottle’s elongated air sac and long trailing tentacles.
While Blue Buttons are not considered highly venomous to humans, officials warned that their tentacles contain stinging cells known as nematocysts, which can cause skin irritation, burning sensations, itching, redness and localised allergic reactions in some people.
Children, people with sensitive skin and those with a history of allergic reactions to marine stings may be particularly vulnerable, the lifeguard service noted.
Lifeguards urged beachgoers not to touch or handle the creatures with bare hands and advised against picking them up or allowing children to play with them. Parents were encouraged to closely supervise children if Blue Buttons are spotted on the beach.
The Phuket Lifeguard Service also requested that members of the public notify lifeguards if large numbers of the creatures are observed along the shoreline.
In the event of contact with a Blue Button, first aid advice includes rinsing the affected area with seawater rather than fresh water, carefully removing any remaining tentacle fragments with tweezers or protective equipment, and avoiding rubbing or scratching the skin.
Applying a warm compress at around 40-45°C for 20 to 45 minutes may help reduce pain and lessen the effects of the venom, lifeguards said.
Anyone experiencing severe allergic symptoms, including difficulty breathing, facial swelling, dizziness or loss of consciousness, should seek immediate medical attention.
The Phuket Lifeguard Service said it continues to monitor beach conditions and provide safety information to residents and tourists to help ensure safe marine and beach activities.