 KwaZulu-Natal's shark culling program killed more than 33,000 sharks in a 30-year period.Recent research has shown that, by mass, fishing debris, such as buoys, lines, and nets, accounts for more than two-thirds of large plastic debris found in the oceans; in the Great Pacific Garbage Patch, fishing nets alone comprise at least 46% of the debris.Similarly, fishing debris has been shown to be a major source of plastic debris found on the shores of Korea.