Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups.
The annual global economic value of coral reefs is estimated between US$30–375 billion.
However, coral reefs are fragile ecosystems, partly because they are very sensitive to water temperature.
My Girlfriend of 2 months recently told me that she has Genital Herpes.
I didn't react badly, I tried to support her and tell her that I won't cut her out of my life because of it, however I'm stuck on what I should now do.
I love her to pieces for who she is, not what she has.
I want to be able to be with her but I've been worrying a lot about how much we can do with one another before risk of catching it comes in.If the land subsides slowly, the fringing reefs keep pace by growing upwards on a base of older, dead coral, forming a barrier reef enclosing a lagoon between the reef and the land.A barrier reef can encircle an island, and once the island sinks below sea level a roughly circular atoll of growing coral continues to keep up with the sea level, forming a central lagoon.Often called "rainforests of the sea", shallow coral reefs form some of the most diverse ecosystems on Earth.They occupy less than 0.1% of the world's ocean surface, about half the area of France, yet they provide a home for at least 25% of all marine species, Paradoxically, coral reefs flourish even though they are surrounded by ocean waters that provide few nutrients.Darwin’s theory sets out a sequence of three stages in atoll formation.