Pearl Farming
Pearl farming, centred at Manihiki atoll, is based on cultivating the black-lip pearl oyster. Cultured pearls are the Cook Islands' most valued export.
A survey for the Ministry of Marine Resources in Rarotonga in the year 2000 calculated 1.5 million oysters were being cultivated. This survey also recorded 111 farms with a total of 690 culture lines and 424 spat collection lines. The total length of these farm lines is 160 kilometers. The farms cover seven square kilometres. It is estimated a quarter of a million pearls a year are produced. This contributes around NZ$18 million to the economy of the islands.