Thirteen fish farms in Pasir Ris - popular for their fish spas, as well as prawning and fishing facilities - will have to close by the end of 2014.
The leases of the businesses, which sit on a 216,680sq m plot of state land, expire between November this year and December 2014.
The government said the site is earmarked for industrial development. This comes amid a drop in Singapore's export of ornamental fish