"Tzadikim who require a degree of inner purification may be reincarnated as fish of the sea. By eating fish on Shabbos Kodesh with proper intention, one can enact a Tikun for the souls of the righteous. This awakens divine compassion, 'midah k'neged midah'...
If this person himself ultimately returns to this world for a Tikun, and is reincarnated in the form of a fish, he will merit a "soul-fixing" by being eaten as a righteous man's Shabbos fish, measure for measure..."
GUEST POST BY: Levite Shlepper ben Herring Maven