This image provided by Mona Hoppenrath of the phytoplankton diversity group active in the long term ecological research program at the Alfred Wegener Institute (AWI) at Bremerhaven and Helgoland and the Wadden Sea station on the island of Sylt. This material provided by Mona Hoppenrath, Alex Kraberg, Tanya Morozova and David Patterson. Copyright Alfred Wegener Institute, used by license to MBL (micro*scope).
Description of Chaetoceros socialis: This species consists of very small cells which are united into curved chains. Cells have three short setae and one long one which causes the formation of larger secondary colonies by linking up in the centre of the colony with the long setae of other chains