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 This image was provided by Alex Kraberg of the Port Erin Marine Laboratory, Isle of Man. Image copyright: Alex Kraberg, image used under 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
