It is hard to see with this pic but I have 2 overhangs, one in the center and one that can be viewed from the left (can't see it in this pic). Both can been seen completely through to the back channel. The firefish hangs in the left one and the angel fish sleeps in the center one. Before this style they both hid deep inside my rocks and I saw much less of them. Giving them shelter with exits on front and back allows them to come and go and feel safe which greatly increased the amount they come out and play in the tank.