• 5 years ago
Billions of colorful algae, called zooxanthellae, that live in symbiosis with corals, are responsible for the beautiful colors of the coral reefs.
There are three type of coral reefs: barrier reef, fringing reef and atolls. Barrier reef is usually located in deep water, away from the shore. Fringing reef is fringe-shaped and located in the shallow water. Atolls are island-shaped. They grow on the edges of the lagoons.

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Animals

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