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Hello GreenZoners,

today we have for you new-old word: new in our EcoDictionary, old on our blog, cause we were writing a lot about it: HERE, HERE and HERE. Oh, HERE as well. Popular topic:).

Maybe you can explain this word without our help?

Ok, here is small help:

coral reefs, also known as rainforests of the sea, are underwater structures made from calcium carbonate secreted by corals. Coral reefs are one of the most diverse ecosystem  on Earth. They are colonies of tiny animals found in marine waters that contain few nutrients.

Interesting: coral reefs are not only beautiful. The annual global economic value of them was estimated at US$ 375 billion in 2002. Unfortunately, they are also very fragile, always in danger.

For more information about coral reef check our old posts:).

Tags: dangerous, rivers, sandbox, sea, shuffle