From a general standpoint, I do not see aquarium breeding impacting sustainable wild collection. I doubt there are figures out there, but I do not believe the majority of people in this hobby are actively seeking CB fish and Aquacultured invertebrates etc...

I only have to look at my LFS to see, if I go there even a couple of days after they have received their shipment, the livestock has been well picked over.

I also find it interesting that in the case of the Banggai Cardinalfish, the economic impacts are also sited as a reason to continue selling willd caught specimens.

These fish are already listed as endangered, and yet are allowed to be sold. http://www.iucnredlist.org/apps/red...ls/63572/0

If a species, such as the Banggai Cardinalfish, was to reach the "critically endangered" or "extinct in wild" status due to this hobby, it may be the political capital needed for " bureaucrats...to justify draconian action."

I only mention this because I support your already stated suggestion of increasing domestic propagation, and not to make this about the Banggai Cardinalfish.

All of the above said, I believe like most things in life, there is a balance to be struck.