Many colonies (for example, Acropora) can be restored (such phenomenon carries the name of regeneration) and use this ability for moving. So, if as a result of a storm any colony is broken, and its fragments are scattered within the same coastal zone, further these slices can give rise to new colonial constructions of the same type, as well as initial. These corals usually have widely placed branches as if specially adapted for such way of moving.
The atoll – the underwater mountain topped with reef construction, having a roundish or elliptic form in the diameter. At coast of the seas in a zone of tropics also the small single reeves which are not forming barriers often meet.