Loud Clicking noise coming out of the tank

[Corbin]

mantis haters! lol. or just hope its one of the speices that doesnt grow over an inch like mine.

[Steve-O-]

I had the same thing, 3 clicks i saw him one day and ripped out the rock he jumped out on the floor. Was a peacock mantis full of color ended up giving it to someone on here. Never had him kill anything tho and no holes in shells

[JohnnyReeftank]

I'vve heard it in my tank too.....usually after the lights go off. I later discovered that a few of my Trochus snails were twisting around in their shells pretty violently... and it made a clicking sound on the glass....mystery solved...for me at least