HELP! missing fish

[gbeef]

Hey i have a biocube 14, and my 6 line is missing?! he was only about an 1 1/2? i cant find him anywhere usually he comes up to feed and swims around normally... I also have a clown fish which is still in the tank. My tank has a lid so i know he cant be a jumper.

Any thoughts?

How fast can a cleaner shrimp and 10 blue leg hemits go thru something? and wouldn't there still be remains? Ive pulled out all my rock also. My tank is a year old.