The Department of Marine and Coastal Resources is urgently investigating the phenomenon of "pink sea slugs" stranded in large numbers on Suan Son Beach, Rayong Province. Initial assumptions suggest this may be caused by wave and current conditions carrying them ashore. The public is requested to temporarily avoid the area.
Following the unusual event of "pink sea slugs" covering Suan Son Beach in Khlong Subdistrict, Mueang District, Rayong Province, local fishermen suspect it may indicate deteriorating or damaged underwater ecosystems. Meanwhile, researchers have initially collected seawater samples for testing and warned against capturing or stepping on the slugs, as previously reported.“Pink sea slugs” cover Suan Son Beach, Rayong Province; researchers warn against touching or stepping on them.)
Regarding this matter, on 6 June 2026, Mr. Thanet Mannoi, Director of Marine and Coastal Resources Region 1, assigned Mr. Prathompong Padsorn, an expert fisheries officer, along with other officials, to visit the area in cooperation with the Eastern Gulf Marine and Coastal Resources Research Center. They collected samples of marine life and analyzed seawater quality to determine the cause of the stranding and to monitor the situation closely.
At the same time, coordination with Khlong Subdistrict Municipality was made to set up barriers around the area where the slugs were found. Public announcements have requested cooperation from residents to avoid swimming or touching these creatures for safety, as some live slugs remain in the area.
Preliminary assessments indicate that this phenomenon may have resulted from wave and current conditions that carried marine life onto the shore. When sea levels rise again, the living slugs may be able to return to their natural habitat.
Finding large numbers of marine animals stranded is important data that helps researchers and marine agencies effectively monitor changes in marine ecosystems.
If stranded marine animals or organisms are found along the coast, the public is urged to avoid capturing, moving, or directly touching them and to notify the relevant authorities for proper scientific investigation.
A healthy sea begins with everyone’s cooperation in monitoring, caring for, and maintaining the balance of nature.
Thanks for the information from the Facebook page of the Department of Marine and Coastal Resources.