Here is the test.........Find me a photo of any reef world wide[with ten or more types of coral in the image,] in which fifty percent or more of the corals in the photo are marketable. {i.e. collectable and similar to what you see in an LFS} We as a hobby collect a very limited range of corals and because so few of the corals on any reef are even of the size or type which hobbyists demand, .. Second, any so called "raped" reefs{if there were any} would recover just as fast as a reef hit by a typhoon or lava blanket or a heard of bump head parrot fish.. If reefs recover within a few years from these natural distroytors of live coral,then any local over harvesting of certain corals would{ if the reef is healthy} recover as fast as someone placing dry rock into the ocean to create aquacultured liverock. It is only when collectors are collecting coral for the hobby from reefs degraded from other pressures like silt run off from agriculture or other stresses on the over all health of the reefs.......that collection of coral may become unsustainable. Collecting or removing a coral from my aquarium has zero negative effects on the other corals in my captive reef. In fact it usually has the opposite effect, over crowding is a major problem for any healthy reef whether its a reef aquarium or a natural reef like the Great Barrier Reef. Take a look at photos of the GBR. Most of the reefs are dominated by huge table Acroporas very little other coras. How many photos have you ever seen in which the coral in the picture was the size and kind of acro we see in the LFS? I challange any one to find a photo of a palm sized acropora in the wild? We as a hobby collect tiny colonies, most of which will soon be over shadowed and shaded by the faster growing colonies growing above it .If you have ten small colonies growing close to eachother.......a few years latter there will only be one collonie remaining . One coral will usually kill off the others in a competition for realistate It has been demonstrated by others that one single bump head parrot fish eats several tons of live coral each year. How many brain corals do angel fish like lemonpeels pick to death each year in the wild? Do you think dwf angels only pick on brain corals in our aquariums?{yah I know in the wild the corals can escape and flee} Healthy reefs are like a topiary bush at Disneyland. you can prune off some of the growth each day and as long as its healthy it will be fine . The reefs need above all else a healthy environment and pure water. Something our hobby needs to get involved in NOW ! What better way then to pay money to islanders to not clear cut their forests by buying the live corals and farming the water instead of the land.