The Department of Marine and Coastal Resources (DMCR) confirmed the presence of multiple jellyfish species following an inspection by the Andaman Sea and Coastal Resources Research Center yesterday afternoon (July 15). Officials were alerted at around 3pm by local lifeguards and a coastal monitoring network.
Among the marine life discovered were several species posing varying degrees of danger to humans.
Officers observed two to three Portuguese man o’ war (Physalia physalis). While technically not called jellyfish, they are strikingly similar and are particularly hazardous due to their painful stings. The specimens found had umbrella-like shells measuring between one and two centimetres, DMCR officials reported.
Blue sea dragons (Glaucilla sp.) were also present. These tiny but visually striking creatures feed on venomous jellyfish and store the toxins in their bodies, making them capable of delivering painful stings to humans.
In addition, officers identified the spectacled jellyfish (Porpita porpita), more commonly known as the ‘blue button’ jellyfish, and V. velella, commonly called the by-the-wind sailor jellyfish. While less dangerous than bluebottles or blue sea dragons, these can still cause irritation upon contact.
Rough sea conditions, including strong winds and waves reaching two to metres metres, are believed to have contributed to the influx of these species along the shore, the DMCR noted in its post online.
Officials from the research centre also checked with lifeguards at nearby Karon Beach and confirmed the continued presence of blue sea dragons, blue button jellyfish and by-the-wind sailors along sections of the beach.
The DMCR urged beachgoers, tourists and local business operators to exercise extreme caution and avoid touching any unfamiliar sea creatures found on the sand or in the shallows. Warning signs and safety information are being disseminated through local networks, with lifeguards placed on high alert.
Local teams have been instructed to remain vigilant in response to the marine hazard. They are to continue monitoring the shoreline for any further sightings of jellyfish and other venomous sea creatures, the DMCR said.
In addition, they have been directed to track any injuries related to jellyfish stings, ensuring that accurate records are maintained and appropriate medical responses are provided.
Authorities are also working to distribute guidance on correct first aid procedures in the event of a sting. This includes advising the public to rinse the affected area with vinegar and to avoid using freshwater or rubbing the skin, as these actions can aggravate the symptoms.
The DMCR also reiterated the importance of seeking immediate medical attention in case of contact with venomous marine life.
As jellyfish blooms are often associated with seasonal weather patterns and sea temperature changes, further incidents may occur in the coming days. Lifeguards and marine officials will maintain patrols and updates, the DMCR said.
Tourists visiting Kata, Karon and nearby beaches are advised to check for flag warnings and speak to lifeguards before entering the water.