With all these restrictive conditions, the world's coral reefs are almost all found within 28 degrees of the equator, and their total area amounts to less than 0.2 % of he world's oceans.
在種種條件限制下，於是地球上的珊瑚礁分布通常只侷限在南北緯廿八度之間的海域，所佔面積甚至不到全球海洋總面積的千分之二。