The occurrence of the dinoflagellate Kryptoperidinium foliaceum is reported for the first time from a hypersaline environment in Kuwait based on recurrent observations of this species from a tidal creek in appreciable numbers. This new record extends the known range of salinity tolerance for K. foliaceum to more than 100 psu. The distribution of the species along a salinity gradient within the tidal creek was studied. The morphological features of the species on the basis of light and epifluorescence microscopy observations are described.
