clicking sound in tank

[WaterLogged]

Thats interesting... Sometimes when there is a little peice of sand that gets sucked up in a pump it makes a little noise when it hits the impellar. Just a thought though.

[i have crabs]

i just cought a tiny pistol after 6-8 monthes of not buying any rock

[Delphinus]

I hear the clicks too in my crab infested cube tank. My guess is that anything with claws can probably cause the occasional clicking sound.

[danny zubot]

Sometimes when a snail is near the edge of the tank the current blows it up against the tank wall, and its shell makes that clanking noise. I have a pistol shrimp and the sound is subtly different. Next time your hand is in the tank snap your fingers under water, that should be close to the sound a pistol makes.

[TheReefGeek]

My red pistol makes clicks exactly as you described. Most often one click, sometimes two, rarely three. And usually more often when the lights go out.

Pistols dig a lot, so you should notice large amounts of sand moving around if you have a pistol, otherwise I would suspect a mantis.

[Jason McK]

Ya from what I have learned Pistol shrimp are single clicks and mantis are multiple clicks.
I've had a pistol in my 75G for 4 years now. didn't do anything to anybody.

First piece of rock into my new tank. I watched a small pistol shrimp jump out and race around the sand bed.

[TheReefGeek]

I love the fact that pistols and watchmen gobies pair up.

Put in a watchman goby, if they pair up it would tell you it is a pistol, not a mantis.

I just got a second watchman for my pistol with the death of my first, and they paired up the second day.