Matjes is basically the same. Popular in the Netherlands and Germany.
The soused herring ( maatjesharing or just maatjes in Dutch, or matjes in German and Swedish) is an especially mild salt herring, which is made from young immature herrings. The herrings are ripened for a couple of days in oak barrels in a salty solution, or brine. The pancreatic enzymes which support the ripening make this version of salt herring especially mild and soft. Raw herring pickled in vinegar are called rollmops.
