A solitary tutumairekurai or Hector's dolphin has been seen swimming around Northland in the Mahurangi Harbour, and possibly near Whangarei's Onarahi Beach and in the Whangarei River.

People in Northland and Auckland are being asked to keep a look out and report any sightings to the Department of Conservation.

Department of Conservation marine technical advisor Kristina Hillock spoke to Māni Dunlop.