In the Skagerrak and Kattegat areas both cell abundance and diversity were low and small cells dominated the samples. Different ciliates and naked dinoflagellates were most common together with cryptomonads. At Å17 some cells of the coccolithophore Emiliania huxleyi were present. The integrated chlorophyll concentrations were low and even below what is normal for the month at several stations. The total cell number and biodiversity at the Baltic stations were mostly low mainly consisting of smaller cells. Quite a few filaments of Aphanizomenon flosaquae were found at the more northern stations BY15 and BY38. At the southern stations BY2 and BY5 quite many flagellates belonging to the order Prymnesiales* were found. The genus Dinophysis* was also common at several stations. The integrated chlorophyll concentrations were normal at all stations.