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With growth rates of 0.3 to 2 centimeters per year for massive corals, and up to 10 centimeters per year for branching corals, it can take up to 10,000 years for a coral reef to form from a group of larvae (Barnes, 1987).lick the image to see an animation. Coral reefs begin to form when free-swimming coral larvae attach to submerged rocks or other hard surfaces along the edges of islands or continents. As the corals grow and expand, reefs take on one of three major characteristic structures fringing, barrier or atoll.
The septa have small to large, rounded to pointed teeth along their length similar to a saw blade. The coral can grow to about 12â³ across, but are usually 2â³-6â³ in the hobby. The juvenile coral start out attached to another coral or the substrate, but the adult coral is free living. One identifying feature for Fungia coral compared to some close relatives is that the adult will typcially show a scar where it was attached to the substrate. The adults have the ability to move on occasion.