The thimble jellyfish initially reported in Barangay Marigondon, Lapu-Lapu City, have now spread to parts of Barangay Sta. Rosa and the causeway area. This development has prompted the City Environment and Natural Resources Office (Cenro) to launch removal operations and issue public warnings.
Deployment of Personnel
On Wednesday, June 3, 2026, Cenro personnel were deployed to the affected coastal areas. They used long-handled fish nets to collect clusters of jellyfish from shallow waters. The collected jellyfish were brought ashore and buried in the sand to prevent accidental contact with residents and beachgoers.
Monitoring and Expert Observations
Lapu-Lapu City Fish Examiner Orlando Leyson stated that the city began monitoring the areas after jellyfish sightings expanded beyond Marigondon. He advised the public to avoid approaching the jellyfish, as they can cause skin irritation. Leyson noted that this is the first time he has observed the brown-colored thimble jellyfish in local waters.
The species has been spotted in portions of Barangay Sta. Rosa and the causeway area. While thimble jellyfish are small and non-lethal, their stinging structures can cause severe itching and skin rashes that may take up to a week to heal.
Seasonal Presence and Cautionary Measures
Leyson explained that the jellyfish appear to be seasonal and may remain in local waters until July. Although Cenro has not imposed a swimming ban, authorities continue to monitor coastal areas where sightings have been reported. Not all shorelines in Lapu-Lapu City are affected.
Cenro advises residents, swimmers, and fishermen to stay away from visible jellyfish clusters and exercise caution when entering coastal waters. As first aid, vinegar may be applied if a person is stung. Leyson emphasized, "Our advice is simple. If you see this type of jellyfish, do not go near it and avoid swimming in the area."
The City Government of Lapu-Lapu had earlier warned that contact with thimble jellyfish causes painful skin irritation, red rashes, and severe itching.
