The plankton community was dominated by diatoms in both Skagerrak and Kattegat and Skeletonema marinoi dominated at all stations. Different cryptomonads such as Teleaulax were also common. The chl a measurements were overall low and no tendency of a forthcoming spring bloom could be seen. A bit higher chl a content was however recorded at Släggö and Anholt E but still within normally low for the season. All stations in the Baltic Sea contained few species with only few cells of each species recorded. The chl a levels were mostly below 1 μg/l which is within normal for the season. Small flagellates and mostly cryptomonads dominated the scarce samples.