SINGAPORE - The National Environment Agency (NEA) will relocate more than 600 coral colonies from a lagoon in Pulau Semakau to to Sisters' Island to make room for more waste.

The move is part of development works at Semakau Landfill to meet waste disposal needs in Singapore up to 2035 and beyond, said the NEA in a statement on Monday. It has called a tender for the relocation, which is expected to take four months.

The NEA had earlier commissioned an independent coral reef survey, which recommended that 27 types of corals be transplanted.

The successful bidder will need to conduct surveys to ensure that transplanted corals survive. The bidder must also monitor water quality and sediment conditions at these sites. Interested applicants can submit their proposal on government tendering website Gebiz by July 24.