A shadowy Chinese super-fishing boat that changes flags and names routinely as it illegally plunders the South Pacific is to be declared a pirate ship by a Wellington based international control agency.Damanzaihao, flying the Peruvian flag, it is the world's largest fishing vessel at 49,367 tons but no one knows what it does in the waters between New Zealand and South America.Wellington-based South Pacific Regional Fisheries Management Organisation (SPRFMO) wants to have the converted super tanker declared an \illegal unreported unregulated\ (IUU) ship – bureaucratic speak for a pirate fishing boat.Changing names and flags is a common technique in IUU fishing.Earlier this year as Lafayette and flying a Russian and then a Mongolian flag, it passed through New Zealand's exclusive economic zone. Later, in international waters east of the North Island, it rendezvoused with four other fishing vessels and a fleet tanker.For the last six months the fleet, without any permission from SPRFMO or any nation, is suspected of taking thousands of tonnes of mackerel. Experts reckon Damanzaihao has a large vacuum system to up-load catch from its fleet and once on board its factory workforce of Third World labour head-and-gut the catch and freeze it.It has not declared any catch to SPRFMO. Damanzaihao is owned by the Bermuda registered Hong Kong based Pacific Andes Food Ltd, one of the world's largest frozen fish suppliers. They claim the vessel is licensed but SPRFMO say it is not.New Zealand diplomatic and political pressure played a crucial role in setting up the convention to create SPRFMO which regulates high seas fishing in the South Pacific. But the Chinese are subverting it and on Friday fishing industry website Undercurrent News reported that SPRFMO has Damanzaihao on a draft list of IUU boats.It obtained a letter from SPRFMO's executive secretary Johanne Fischer in Wellington written on Wednesday accusing the vessel of \severe breaches\ of the convention. She told Peru's director of fishing, Carlos Carillo Mora, Damanzaihao would go on the list. In the letter she noted that the ship's \unauthorized presence and activities… has attracted attention in the international media.\China's Pacific activities have come under intense scrutiny this year.SPRFMO is a multinational body that came into force in 2012 in a bid to fend off a collapse of Pacific mackerel that has seen the stock fall from 30 million tonnes to just three million in two decades.