New Zealand has 15,000 kilometres (9,300 mi) of coastline making it the 9th longest in the world. The coastline borders the Tasman Sea and the Pacific Ocean. The northern and southernmost points of the coastline on the two main islands are Surville Cliffs and Slope Point respectively.
Cape Reinga in the north and Bluff in the south are often incorrectly given as the extremities of the coastline on the North and South Islands. Coastal development, such as buildings and marine farms, has become contentious in recent decades.