I wonder which is more damaging to the reefs:
-Regulated/Limited collection of wild fish/corals.
OR
-Unregulated influx of tourists being hauled into reefs by boats and dumping sunblock, food, alcoholic beverages, etc into the water.
There is also the issue of massive development of beachfront properties resulting in silt and waste runoff into the waters and killing of reefs wholesale.
Stopping the collection of hundreds of wild fish will not save them if the reefs are killed off on a more massive scale by other factors.
The Fish/Coral trade industry in this case is the "little fish" compared to some other factors.