strange noise

i have had this strange noice in my tank for quite awhile now and still to this day i have no idea what it could be
i have had my suspicions that it was a a crab i had spotted around the tank. but two days ago i removed it (gorilla crab). but yes now i am stuck with the same noice once again... previously people have said that it is a mantis shrimp but when i look into the tank i can see only my snails on the move...
could it be a pistol shrimp? or even a small mantis....

Help!

 

whats the noise? popping/clicking? If so, probably a pistol shrimp. Could even be a hermit crawling along the glass tapping it. Look for little dugouts and burrows, then take a piece of table shrimp and set it outside of one of the burrows, should come out to grab it within a minute or two if it indeed exists in your tank.

 

Can you describe the noise? If it's clicking or popping, it could be either a mantis or a pistol shrimp. Do you have metal halides and only notice a popping/clicking noise after the lights go out? If so, it could just be your bulbs cooling down.

 

yes sorry i should add they are clicking noises

 

took me a year to see a hitch hiking mantis. so its possibly could be that. either in your rocks, or maybe within a burrow or cave it lives in. i havent dealt with pistols so cant comment there. just keep your eyes , and ears , lol, alert. ya never know what youll find.

 

Is it when the lights go off? If so, how long do you hear it?

 

I guess you are gone.............

 

sorry mate, yeah i was computer didnt like the site that much um to answer your question the clicking noises can be heard all the time much more at night but though-out the day too

 

O.K., Sometimes lights cooling down make clicking....whatever....noises. Now, does seem to indicate a shrimp or other creature. Just because you can't see it doesn't mean it doesn't have a lair out of sight.

 

the lights are only t5's and the noise only started when i added more base and live rock. to be honest i have caught a pistol shrimp and i believed to have seen something that resembles a small or baby mantis shrimp