The Johor Fisheries Department has issued a warning about the presence of dangerous gastropods identified as Petropoda (Creseis Acicula) in the waters of Mersing.

According to the department, the pteropoda (a small species of sea snail or slug), which originates from tropical and subtropical waters, was detected by a research team from the Batu Maung Fisheries Research Institute, Penang, on June 11. 

“Climate change, increased water temperature and ballast water from ships are believed to be the cause of the spread of this species into the country’s waters.

“This mollusc (soft-bodied animal without bones) has a sting that can cause inflammation, itching, dryness, peeling, redness, and scaly skin,” read a statement on its Facebook page.

It advised the public to stay away from water-related activities in the area for now and that those who came into contact with the animals and showed symptoms should seek immediate treatment.

- Bernama