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Tolerance of a facultative marine fungus Aspergillusflavus towards As (V) was tested. Luxuriant growth of the test isolate was observed in culture media with As (V) concentrations of 25 mgL-1 and 50 mg L-1, indicating its tolerance to the metal. Accumulation rate of arsenic was always higher when exposed to As (V) at 50mgL-1 than at 25 mgL-1. The study reveals Aspergillus flavus as a promising candidate for environmental bioremediation. Arsenic contents (mgg-1) in thc fungus when exposed to 50mgL-1 As (V) were measured as 11.1773, 4.0983, and 8.0000 mg g-1 on day 3, 6 and 9, respectively. The highest content was observed initially, i.e. on day 3, followed by a decline and a rise again. These results provide baseline information for further explorations regarding the exploitation of the fungus for arsenic removal.