In the next video, use Clic-MOI to find reef-building corals and the two-band clownfish, both recorded in the segments of Jardin de corail. Before opening a profile, note what you actually see: shape, position and movement. “It is near a shelter” describes a position; “it is defending that shelter” is an interpretation requiring more evidence.

A coral is neither a plant nor a stone: it is an animal. In colonial corals, many polyps live together. Stony corals deposit a limestone skeleton; accumulated structures, together with other organisms and physical processes, contribute to a reef. The next profile distinguishes the living organism from the structure it produces.

Many shallow tropical corals host microscopic algae within their tissues. Through photosynthesis, these algae supply part of the coral’s nutritional resources. Polyps can also catch small prey with their tentacles. This association is a symbiosis: it does not mean that all corals live in the same way or that light alone feeds them.