Jonas Collén did his undergraduate and graduate studies at the Uppsala University. After his thesis under the supervision of Marianne Pedersén he left Sweden for post-docs at the University of Maine (USA) and University of Sao Paulo (Brazil). In 2001 he arrived in Station Biologique de Roscoff (France) where he now has a permanent position. The research interests have been focused on physiology, ecophysiology and genomics of intertidal seaweeds. His interest for Eucheuma (sensu lato) started during my thesis when he studied photosynthesis and defense reactions.