You would not believe what you'll see in Asian countries(most). Knowing how easy it is to obtain corals, fish, inverts, etc. in those areas due to close connections, the livestock are usually not cared for because they know they can get more easily and in large bulk cheap unlike US where importation is expensive, long and have many restrictions. Therefore care in the US or almost anywhere else in this matter would be better compared to countries with closer source. Go to south East Asian fish stores , their fish and corals are usually horribly kept. Gotta come on the first day to get the good healthy ones or from other reefers ofcourse.
I've actually talked to workers in a chain fish store in south east Asia. He told me it's not uncommon for more than several fish die a day in their store, with no remorse. A DAY. And that's just for the marine fish.
This is mostly chain fish stores, just want to state that out because I do not want to generalize all of them as some are very good.