Biosecurity New Zealand is still tracing genetically modified tropical fish that were unwittingly allowed into New Zealand this year. Ministry of Agriculture and Fisheries (MAF) officers seized and destroyed some 300 of the zebra danio fish in raids on two Christchurch pet shops and two private premises in July. They had been alerted weeks earlier by concerned members of the public who noticed the zebra danio fish, a breed popular with ornamental fish enthusiasts, for sale on the internet.