The effect of fungi colonies on fatigue of 7075 aluminum alloys was studied for specimens corroded at different media. 57 specimensof aluminum alloys were submerged in Shat-Arab water (Sh.A.W) for four months at different conditions (at light media (9 fungi colonies), dark media (80 fungi colonies))and then applying constant fatigue tests after removing the specimens from the corrosion media . The results show that the fungi colonies can corroded Al alloy the reduction of pre-corroded specimens at light media (9 fungi colonies) was 13% and for specimens at dark media (80 fungi colonies) was 22% , and a nonlinear damage model was proposed to predict the cumulative corrosion fatigue life