Missing Clownfish, wtf

[likwid]

Hey guys.. I have a 10g tank that has been up and running for over 6 months now. In it I had a clownfish, 2 hermits, 2 turbos, and 3 astrea snails, as well as some various corals. I came home from work today to find that my clownfish is no where to be seen. I have checked all the rockwork, coral, etc, and I have no idea where it vanished to. Has this happened to any of you before? What should I do now?