p. 251 - 266 INDICATEURS DE POLLUTION MARINE I. Phycomycetes Mukadder Apas 1) et Ana Hulea 2) 1) Institut Roumain de Recherches Marines Constanta 2) Institut pour la Protection des Plantes Bucuresti Abstract In marine polluted waters there are indicator organisms; besides them marine fungs are considered. A big numbers of of samples from the nearshore Romanian marine waters(1,330), as well as from the sands (230) were analysed throughout 1975-1980 period. It has been identified eleven marine fungs belonging to the Phycomycetes Class., Chytridiales, Saprolegniales, Peronosporales and Mucorales orders. The shape and the size of the mycelium, sporongia and sporan- giophores were used for the systematic account. The morphology, seasonal variations and spred, are described for each species.