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DougBak

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Pseudocolchirus violaceus (Theel 1886), (Australian) Sea Apple, Violet Sea Cucumber... Eastern Indian Ocean and Western Pacific. Can be deadly toxic if disturbed... do not keep with Sea Urchins, predatory Sea Stars (e.g. Protoreastor, Asthenosoma). Sensitive to poor, changing water quality. Largely a filter feeder.
Above quoted from wetwebmedia.com

FWIW I've personally stayed away from them due mainly to the damage they can do when disturbed.

Here's a link to the page: WetWebMedia SeaCukes
 

Len

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It's true. If they feel threatened, they have been known to "nuke" the entire tank. I've seen a nuked Sea Apple tank and it's not a pretty sight.

But to answer your question, yes, it's normal for the tentacles to come out mostly at night since that is the time the water is most dense in plankton for it to capture.
 
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Anonymous

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http://www.advancedaquarist.com/issues/ ... invert.htm

Assuming you don't stab it, or let it get sucked up by a powerhead, it's not likely to nuke your tank. We've had one for years with no problems. Ours will extend its tentacles when we feed the tank phyto and zooplankton. It likes being right near the spraybar from the return.
 
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Anonymous

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ive heard pretty much negative feedback for these beautiful creatures...even from Charles Delbeek..they can be deady to a tank..i have no experience but just what ive heard suggest it doesnt take much to piss these guys off...Fortunately for you Matt sounds like you had a good specimen or did something right...I dont know if these guys are impossible to keep but they dont sound very hardy....
 

elpescado

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In the years that I have worked at a fish store I have kept 8 or 10 specimens and have never had one "nuke" anything in the tank it was in (even with some of them dieing and turning to mush). Out of all the customers I have had over the years only one has reported one nuking their tank. That person did not run a protein skimmer, and it was a smaller tank.
I never recomend them to anyone unless they have a good skimmer and a larger system (75gal and larger). The potential risk, however, is always there.
 

kim

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Some poor fellow on a UK based board just had an apple nuke the tank. All lives lost. Skimming wasn't really a lot of help.

Admittedly he started it by passing the apple through his powerhead.

Let's face it, most people have powerheads. If the apple doesn't get it, the anemone will.....

kim
 
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Anonymous

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I know of quite a few folks who don't have powerheads in their tanks. It's a necessary precaution for all sorts of animals like cukes, octopuses, and anemones; some people keep them out of the tank just for looks. Providing you can protect it from this kind of traumatic injury, it's unlikely it will nuke a tank.
 

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