The lakes biological situation shows many common aspects: infact, though a little general health improvement has been confirmed, the last analysis put the general conditions between sufficient and poor. Euthrophization that have taken place during these last decades in the three lakes water and the Candia marsh, due to an excessive amount of nutrients coming from the drainpipes and the agricultural techniques, have caused a progressive impoverishment of the present biotypes, leading to a loss or a reduction of some life forms of the lake ecosystem trophic chain. Lake Endine Lake Candia                   EN007