Snapping sounds in my tank

[no_bs]

or pistol shrimp

[blueyota]

Just the missing fish leads me to think mantis....not sure but i dont think pistolshrimp will kill fish

[Toolman]

the other mantis didn't make any sounds like I hear now, could either of the crabs be doing it ? I heard that gorrila crabs are bad ???

[Toolman]

The snapping is rapid fire if that means anything ??

[untamed]

Originally Posted by Toolman

The snapping is rapid fire if that means anything ??

I don't think you can tell the difference between a pistol or a mantis just by the snap noise. I wouldn't worry about it either way.

[Toolman]

I am pretty sure the fish are worried about it

[Canadian]

There are a number of things it could be. Mantis and pistol shrimps get blamed most of the time. But I've heard similar noises from clown fish that will making a snapping sound with their jaws from time to time. Additionally, I discovered earlier this year that blue leg hermit crabs can make similar sounds as they attempt to violate each other for their shells. I was sitting by my tank and heard that dreaded clicking sound and jumped up to see what it was. I discovered it was a hermit crab violently tugging on another crab trying to evict it from its home and hitting the shell on the glass of my bare bottom tank.