Five submerged hydrophytes flourished in north east Nile Delta have been chosen to be the subject of this study. These are Ceratophyllum demersum, Myriophullum spicatum, Potamogeton crispus, P. nodosus and P. pectinatus .They were growing at three different hydric habitats (kafr Demira irrigating canal, El Gammalia with agricultural chemicals and contaminants and Manzala Lake with both organic and inorganic pollutants. This study goals are: a) providing quantitative estimates about the environmental conditions (both physical and chemical characteristics of the bottom sediments and overlying water) and the floristic characters of the hydropytic and wet canal bank vegetation at the five habitats .b) descriptions of the morphology and anatomy of the studied species) estimation of heavy metals accumulation and release of these menials from living and dead plant samples. d) investigation of the primary metabolic products of the plants, and e) elucidate the physiological aspects of the studied species including: the chlorophyll content, number and size of starch grains in the chloroplasts, membrane stability index, relative water content , changes in heavy metals concentration in plants.