Experts believe the creatures belong to the Creseis sea snail species, as authorities warn people to stay onshore until the creatures disappear

Residents of Prachuap Khiri Khan’s Pranburi District have complained to the Marine Department after 37,500 tonnes of muddy sediment, dredged from the navigation channel at the Hua Hin–Pattaya ferry pier, was dumped on Pranburi Beach.