An epifluorescent photo carries other information than phase contrast setting. In epifluorescent microscopy, the light emission source is the sample alone, so this technique permits to see a cell's microstructure, in some cases even at molecular level. Phase contrast setting uses a translucent light showing the cell's macrostructure. Images have been made by Nikon Eclipse E 600 light microscope using an original magnification of 400x - 600x range, at South-Transdanubian Emvironment Protection Inspectorate, Laboratory for Environment Protection (Hungary). Photos of algae have been taken from samples of natural surface waters of South-Transdanubian region; the majority originated from river Dráva and lake Baláta. Scientific names of algal speciei are found in the header of the images.