Grooved-Brain Coral [Diploria labyrinthiformis] --- Brain coral is a common name given to corals in the family Faviidae so called due to their generally spheroid shape and grooved surface which resembles a brain. Each head of coral is formed by a colony of genetically -dentical polyps which secrete a hard skeleton of calcium carbonate; this makes them important coral reef builders like other stony corals.
Great Barrier Reef - #Australia. Featuring 400 types of coral, 4,000 types of mollusk, and 1,500 species of fish, the Great Barrier Reef is the largest reef system on Earth. It was named a World Heritage Site in 1981, and is one of the most popular tourist destinations in Australia.