Nearly 70 percent of the mangrove has been reclaimed, NGOs said.
An exorcism technique believed to counter sorcery is being played through loudspeakers.
The government wants to do a test landing before a presidential election on September 23.
Developing an airport on Kulhudhuffushi was a campaign pledge of President Abdulla Yameen.
Kulhudhuffushi's Eid parade has become a way to mock the government and its broken promises.
The men are accused of trying to bring the Maldivian Democratic Party to power.
Neither the Housing Ministry nor the island council has contacted families about relocation plans.
The funds will be used for specialty doctors, a CT scan machine and MRI machine.
Tremors in the central Maldives were the result of reef blasting by a local resort firm.
A swathe of the Kulhudhuffushi mangroves was reclaimed for the airport project last year. The lagoon was reclaimed all the way to the reef’s edge on...
An islander said envelopes carrying MVR1500 (US$97) were distributed during an event at Afeefuddin School.
The demonstrators gathered outside the ministry with placards, demanding an urgent meeting as plans to raze the mangroves are thought to start on October 30.
The investigation was launched after images of dried shark fins kept to be smoked in the sun surfaced on the social media
Two men were arrested in Kulhudhuffushi for calling for prolonged protests over a primary school teacher's death following a botched caesarean section.