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.