People can no longer take kuku/mussels from a 0.1 sq km area of Ōhiwa Harbour in the Eastern Bay of Plenty.
A two-year ban on taking the shellfish came into force today.
Oceans and Fisheries Minister Shane Jones said in a statement the ban would support local efforts to restore mussel beds in the area.
Te Rūnanga o Ngāti Awa requested the closure, Te rāhui kuku ki tua o Kanawa, to support its traditional rāhui and an area of the harbour where mussel beds had been reseeded.