While some people may possibly eat fish that are meant for aquariums, it is not a good idea to consume these fish. Since these fish aren't regulated by the government for food, eating pet fish could be dangerous. Like goldfish, other fish that typically live in aquariums could be infested with parasites that could make a person very sick or even kill them. Luckily, for most people, eating fish from an aquarium is not appealing, which keeps people from eating potentially harmful fish.