Anthony wrote saying: ''There are literally thousands of tiny jellyfish in the sea and washed up on the shore . . . some are large.
''It is worth someone coming to look at to research whether they are a health risk or not . . .''
A staffer at the Holiday Inn Resort said that plagues of jellyfish were an occasional event off Phi Phi and elsewhere around the Andaman region.
''They are not dangerous and they usually disappear within a day or so.''
A spokesperson at the Phuket Marine Biological Centre said they would investigate.