Sheikh Mohamed El-Moctar El-Shinqiti, Director of the Islamic Center of South Plains, Lubbock, Texas , states: “This is usually done for the sake of flavour, which means the taste of alcohol, even small, will remain in the fish. Therefore, it is forbidden.
However, what is considered insignificant (according to Muslim scientists no more than 0.05%) and therefore allowed, is when a tiny portion of alcohol is mixed with a huge amount of liquid that consumes it overwhelmingly. This is based on the juristic rule of istihlak (consumption).”