A large number of kanakana, or lamprey, in some Southland rivers have been found sick and dying from a bacterial disease.
The bacteria is not a risk to human health. But, it is recommend that you do not eat kanakana that look unusual or unhealthy.
This disease has not been identified in New Zealand before.
There is a risk that it could spread to other commercial and recreational fish including salmon, trout, eel, whitebait, and native fish such as kokopu.
Further information here: http://www.fnzas.org.nz/?p=2546
Also from MAF: 'If any of your members come across fish that exhibit symptoms they should be encouraged to report the finding to the MAF hotline (0800 809966) as we are interested in getting a better understanding of the disease and how far it has spread. If your members retain the fish to send in for analysis they should be encouraged not to freeze the fish.'