Coral colonies are formed by thousands of tiny animals called polyps. One individual coral polyp will develop into many individuals called colonies. After that, coral reefs will become the habitat of various species of marine plants, marine animals, and other marine microorganisms that are not yet known.
On my trip some time ago to one of the beaches in Aceh, Sumatra island, I found so many piles of coral reefs. The size is big. Some of the corals have even been stranded on land. While others are still submerged in sea water, around which various types of fish and shrimp live.
Here's my follow-up stock photo on coral reefs for today. The photos were shot using a Nikon D300s camera.