i have a slat water tank and if i can take a picture of it i will but as soon as i see him it runs right back in...too me it looks like a spider as far as i seen it was white/gray with at least 4 legs with little tiny spikes coming out the legs...am worried if this creature like spider will hurt my animals i have in my tank...but as soon as i get a picture ill post but does anyone have an idea of what this could be?