In a paper 1935, Drouet and Cohen, described that they had found the rarely observed flagellate Gonyostoum semen in a sphagnum swamp in Woods Hole, Massachusetts, USA. This locality is referred to by residents as the Cedar Swamp. This year we managed to enter the swamp, find the open water, and resample. Just as in 1934, there was a major bloom of Gonyostomum, dominated the phytoplankton community entirely! The next step is comparative analyses to European populations.