p. 225 - 233 QUALITATIVE AND QUANTITATIVE CHARACTERISTICS OF THE ALGA EUTREPTIA LANOWII (STEUER) IN RELATION TO THE COASTAL POLLUTION PHENOMENON Pia-Elena Mihnea Romanian Marine Research Institute Constanta Abstract Data on the biological cycle and quantitative variations in the species Eutreptia lanowii are here presented. The correlation of this organisms with the environmental factor proves its occurance and development as a consequence of the sea water quality modification in the coastal zone.