The benthonic algal vegetation of the venetian coasts has anthropic origin. Though it is possible to distinguish several good associations with their characteristic species. The most important ecologIcal factors are waviness, light and tide. LITERATUR KORNAS, ]., PANCER, E., BRZYSKI, B.: Studies on Sea-Bottom Vegetation in the Bay of Gdansk off Reva. - Fragm. £lor. et geobot. 6 (I): 1-9I. ...