Are Teddy Crabs good or Bad??

Discussion in 'Invertebrates' started by PeterL, 9 May 2010.

  1. PeterL

    PeterL

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    I have noticed that every time I find a teddy crab in my DT (of which seem to be breeding out worse than mice), I just catch them and bomb them into my sump - or hand them to friends with hungry Mantis Shrimp :whistling:

    I noticed another 1 in my DT tonight, caught 1 of the 2 I saw last night so I am guessin that I only have the 2 left - not sure...

    Are these things good or bad in a reef tank? Are there was of getting rid of them without comprimising the LS or fish? Or should one just ignore them?
     
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  3. Tremayn

    Tremayn

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    post a pic :) .. if it looks like a swamp monster hear they are bad
     
  4. colbar

    colbar

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    As far as I know they are real bad!
     
  5. Dane

    Dane

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    Hey zombie, need pics for ID. There are a couple of "furry" crabs; ranging from reefsafe to terrors! :)

    I'm quite keen to setup a little pico with one of these in! :-(
     
  6. Dane

    Dane

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  7. Dane

    Dane

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    Verbatim from above site:

    "The Xanthidae Crabs (link - extensive photo gallery) None of which can be considered reef safe and can be the most destructive of the crab types. While very small, they seem to pick at algae on the rocks, but just as with other crabs species, once they gain a bit of size, their ability to pick off and eat any number of invertebrates and corals also increases. They also have a bad habit of enlarging their hiding places within live rock and will, in due time, weaken the rock considerably.
    Below, a commonly found Xanthid species living within live rock."

    [​IMG]

    [​IMG]
     
  8. PeterL

    PeterL Thread Starter

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    hmmm, a little light brown crab with fine hairs on it, tiny black dots for eyes and only the tips of their pincers are black. Varying between 8-12mm diameter - I will try post a pic tonight, if I can get one in a glass or other container. Not the easiest things to catch......I can't help but notice how it is only the newbs giving feedback
     
  9. PeterL

    PeterL Thread Starter

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    just for a side note, I know they break up the rock, I also know they eat almost anything near their tunnel system...the question is are they specifically destructive to a reef tank or are they the sort of thing one ignores?? What level of importance does one guage these critters to their removal from a DT?
     
  10. Dane

    Dane

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    Hmmm. Can't answer that sort of value judgement.... Think its your call! ;-) I know a lot of people just leave them to their devices - until they do something bad. If you're not too attached to your CUC and arent worried about your rockwork then I guess put it on probation. From what I've heard the very fuzzy white one isn't too bad, but the others can cause some havoc.
     
  11. Dane

    Dane

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    If you dont want it let me know! :) I'm super keen to put it in a new nano I'm building for my girlfriend. I can arrange collection ^_^
     
  12. PeterL

    PeterL Thread Starter

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    I have a sump which seems to house these little critters quite well, I just sump what I catch for the most part - except my MANTIS freekin' shrimp - lol...that is another story on it's own though.
     
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