If a dead fish having scales, about which it is not known whether it was caught from water alive or dead is in the hands of a Muslim it is lawful, but if it is in the hands of a non-Muslim it is unlawful although he says that he has caught it alive. It is not necessary that a person catching a fish should be a Muslim or should utter the Name of Allah while catching it. It is however necessary that if he is a non- Muslim, a Muslim should have seen him catching it or the fish should be alive at the time of buying or he should become sure by some other means that the non-Muslim caught it from water while it was alive.   _{Your Comment}