The import and sale of naturally bred species should continue to go ahead....however....
That same import and sale should be far tighter on regulation in regard to the husbandry in both the breeders facility and the vendor facility. Transportation of any imported fish whether internationally or domestically should be much better regulated and licensed.
Vendor's should be subject to 6 monthly checks to keep their licence to sell. These checks should entail making sure that holding aquariums both behind the scenes and front of shop are kept properly maintained. All fish should be rested for a minimum of 3 weeks after arrival off the shop floor, this would allow any health issues to emerge and either treated by vet or culled as required....no more vendor treating as the average vendor or shop assistant is not qualified. Any vendor who fails checks should have a three strikes system. First mistake, educate them. Second mistake, educate & fine them. Third mistake would be removal of licence to sell livestock of all kinds for a minimum of 5 years.
Breeders, both at home or abroad, private backyard or farm. Full licensing required, quarterly checks on facilities. Bloodline records to be kept and checked, health & welfare checks without notice by vets. Same three strikes rule as per vendor with a minimum 10 year ban on commercial breeding and confiscation of all equipment/fish.
A complete ban on breeding, import, export and sale of all genetically modified, injected or otherwise unnatural fish. Anyone caught doing so would face a minimum 6 months incarceration, heavy fine and confiscation of all equipment and fish. Life ban owning fish.