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Old 01/16/2008, 06:12 PM   #1
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BangkokMatt's Avatar
Join Date: Jan 2006
Location: Krung Thep
Posts: 3,100

The rocks I have placed on the sand have a habit of moving during the night. Some of these are rocks half the size of a mans fist and the have moved as far as 15 inches.

This morning I awoke to 3 corals shoved together. My large open brain was angled upwards with another coral underneath it and a small frag of Acan shoved to the side of the pile. It was an expensive gooey mess. I shone my torch into the mess. No critters in there but a clicking came from the tank.

Is this the work of a Mantis? Are they capable of moving such relatively heavy rocks? Any other suggestions as to what it could be?

I've spent a lot of money on booze, women and fish. The rest I just squandered.

Current Tank Info: 150g sps Reef (now FOWLR after a devastating crash due to chiller) , 2x400w MH (Icecap ballast, Lumenmax 2, Reeflux 12k SE), Deltec AP701, Grotech Tec III, Chiller, 2 x Tunze 6101, 1 x 6205 (+ m/c), bla bla
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Old 01/16/2008, 06:26 PM   #2
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sounds like a mantis to me, my peacock was incredibly strong

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Old 01/18/2008, 05:50 PM   #3
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If it was a mantis, it would have to be big enough to move those rocks. Keep an eye out for the culprit, but you definitely would have noticed it. Nor have I ever heard of a large enough species of mantis to do that hitch in.

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Old 01/18/2008, 05:57 PM   #4
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Location: Newark, DE
Posts: 1,105
Pistol shrimp could do it but you would have seen it by now. I have seen my 5" hippo tang move rocks out of her beding area with her mouth. The largerst of these was 2" across. If I move the rock back she moves it farther away.


Current Tank Info: 75 gallon in wall working on a 220 gallon in wall tank
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Old 01/18/2008, 09:06 PM   #5
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Join Date: Oct 2005
Location: Phoenix area, AZ
Posts: 2,599
Get a red flashlight, turn the lights out, awhile later place some sinking food in the tank... and see what turns up.

Good luck.

~Jason Begalke

Current Tank Info: Latest project: JBJ Cubey
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Old 01/19/2008, 12:17 AM   #6
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sounds like magic rocks to me

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Old 01/19/2008, 03:55 AM   #7
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Or "magic" tobacco been smoked.


Current Tank Info: 10g nano reef
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