And probably could carry diseases / toxic substances. LOL @ going to doctor with an indigestion.take them to a fish store, some might even give you store credit for them... killing them when you can take them back is just stupid, the only reason I could see going that route was if the fish was about to die from being sick, even then its still hard to do... As far as eating them, I wouldn't. probably not the best tasting fish.
Doctor: "What did you eat before?"
Patient: "Well, I ate a couple of mollies."
Why would they carry more or less disease than fish caught in a local lake or ocean?