The AlgAware report No 6 will be divided in PART 1 and PART 2 because the expedition in June is divided in two cruises. This report present phytoplankton analyses from the Baltic Sea. The Aphanizomenon flos-aquae dominated southeast part of the Baltic and three species from the genus Dinophyceae was present D. acuminata, D. norvegica and D.rotundata. Gotland Basin was dominated by small colonyforming cyanobacteria and the filamentous Aphanizomenon flos-aquae. It was a very low cell density in Kalmar Sound and the phytoplankton community consisted mainly of picocyanobacteria and cryptomonads.