Alewife. A migratory fish very similar to the herring, with silvery skin and strong flavour, abundant on the east coast of North America. It has a single spot on each side, behind the operculum and is deeper in the body than a herring. It is available smoked or pickled. The last stop on the Red Line of the Boston 'T' is Alewife, presumably indicating that a lot of these fish used to be landed in Boston.