Red tides, for example, regularly form off the Cape coast of South Africa, fed by nutrients brought up from the deep, and off Kerguelen island in the Southern Ocean.

• 例如，很多赤潮定期地出现于南非开普海岸附近的海面上，被从深海带上来的营养物质所供养，还有出现于南大洋克尔戈伦群岛海面的赤潮。