<p>The national monitoring program was initiated by the Swedish Environmental Protection Agency and is now financed by the Swedish Agency for Marine and Water Management.</p><p>Monitoring is performed by the Swedish Museum of Natural History. Data is stored in the Swedish archive for oceanographic data (SHARK) database, curated by SMHI.</p><p>Information about the program and the methods are available in Swedish at the website of the Swedish Agency for Marine and Water Management https://www.havochvatten.se/vagledning-foreskrifter-och-lagar/vagledningar/ovriga-vagledningar/overvakningsmanualer-for-miljoovervakning/overvakningsmanualer/patologi-hos-grasal-vikaresal-och-knubbsal.html</p>;