E corals can recover one problem with recovery is that they fight for space with algae (might takeover if enough time has passed by without recovery of coral) Breeding programs require a lot of time last possibility you want to use. Most cost effective method is to just protect the area itself. Category ia: nature reserves: protected areas that are strictly set aside to protect biodiversity and also possibly geological/geomorphological features, where human visitation, use and impacts are strictly controlled and limited to ensure protection of the conservation values. Such protected areas can serve as indispensable reference areas for scientific research and monitoring. Areas where human access is strictly prohibited. Category ib: wilderness area: protected areas that are usually large unmodified or slightly modified areas, retaining their natural character and influence, without permanent or significant human habitation, which are protected and managed so as to preserve their natural condition.