A legislator has called on the government to act against casino ships that offer on-board gambling during overnight cruises from Hong Kong with no fixed destination. The call came after an investigation by the Sunday Morning Post found that the Neptune, a cruise ship operated by the Hong Kong-listed Neptune Group, had its casino open while in Chinese waters. The vessel, which was supposed to cruise into international waters, had instead been found by the Post to have anchored near Dangan Island south of Hong Kong - which is administered by Zhuhai - while its casino was open for business. Hong Kong's Marine Department said it was aware of the illegal practice but there was little the department could do because the casino was operating outside Hong Kong. Legislative Council security panel member Albert Ho Chun-yan accused the Hong Kong government for failing to act. 'One characteristic of such cruises is that the vessel is going nowhere,' he said. 'The government can review its present policy and stop this by banning cruises without a port of destination. 'If the Hong Kong Marine Department can think of some excuses to stop us from going to the Diaoyu Islands to protest, they should have very strong reasons to intervene and stop the casino ship from doing illegal things outside Hong Kong.' Legislator Paul Tse Wai-chun, who represents the travel sector, said: 'The Hong Kong government has a responsibility to protect the interests of passengers on a Hong Kong ship.' They might not know exactly where they were when the casinos opened for gambling and they ran the risk of arrest for gambling in Chinese waters, he said.