EN
In April 2001 a local bloom of the heterokont phytoflagellate Pseudochattonella farcimen (Riisberg I., 2008) (initially named Chattonella aff. verruculosa) was observed for the first time in the southern part of the Gulf of Gdańsk. The species occurred in high cell densities: the count was 11.5×106 cells dm−3 and the biomass 927.5 μgC dm−3.