fish missing ?????

[steel]

some of my fish have just vanished a cleaner a BTA and a salfin tang just gone i dont know why they would die my DKH is down a bit but other than that everything is ok i also moved some live rock to see if i could find them. no such luck and they where fine for months and just the other day they ahere gone? dont know if some one could help or give me some idea.
it would help. thanks
Travis

 

[bigarn]

If your absolutely sure they're not hideing out...perhaps you have a Mantis. Do you hear clicking or tapping in the tank at night?

 

[saltywhit67]

I have had this same problem, once an anemone ate my sailfin and another time the water level was high and my clown jumped out and i didnt find him until i moved the entire setup.