Zostera marina
Adults are potentially omnivorous, but mainly feed on different types of vegetation. In the Baltic, these include brown algae ("Fucus" spp., "Elachista fucicola, Pylaiella littoralis"), green algae ("Cladophora glomerata", "Ulva" spp.), and Phanerogams ("Stuckenia pectinata", "Ruppia" spp., "Zostera marina")"."