Reef urchin

Discussion in 'Invertebrates' started by Martinsreef2, 17 Feb 2008.

  1. Martinsreef2

    Martinsreef2

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    My reef urchin is doing something Ive never seen before, sheding his spines and as you can see below, the new ones are smaller. Now before he was in this set-up, I had him in my old 120 gallon reef but now since he's been in my 29 gallon Nano. Question is, is he now doing this due to lack of space?

    Before;

    [​IMG]

    and this morning...

    [​IMG]

    Has anyone else had other urchin species do this?
     
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  3. jacquesb

    jacquesb Retired Moderator

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    Hi Martin - not too sure - it could be some stress of some kind that makes it shed it's spines..... Perhaps the change from your 120g tank to the nano? Don't think it is space related.

    Are there any water parameter differences between the 2 tanks?
     
  4. Shaun

    Shaun Retired Moderator

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    I know some urchin can be used as an indicator for water quality as they are very sensitive to change, must be stress as jacquesb said.
     
  5. Warr7207

    Warr7207

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    Is it a algae eater ? may be the 29g cannot create enough algae for the beast.
     
  6. Martinsreef2

    Martinsreef2 Thread Starter

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    That would be the Ammonia spike Ive got... 0.25ppm.
    :blushing:
     
  7. Martinsreef2

    Martinsreef2 Thread Starter

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    ..


    ..
     
  8. jacquesb

    jacquesb Retired Moderator

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  9. Reef Maniac

    Reef Maniac MASA Contributor

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    I think both...
     
  10. Martinsreef2

    Martinsreef2 Thread Starter

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    No, there's pletty of algae to eat in there!
     
  11. Obi-Wan

    Obi-Wan

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    Hope my reply is not too late to help you.

    Your specimen is not doing it due to space constraints...but it is related.

    Smaller volume, less stability inherent in system, RIGHT?

    Ideal Parameters:

    SG - close to, or full strength
    T - species origin dependent, on Tropical Reef
    Alkalinity - Min NSW levels 2.5mEq/L
    NH3,NO2,NO3 - 0 0 minimal

    and absolute MINIMUM heavy metal presence!!!

    I have had it happen, it is NOT PLEASANT.
    Outcome is often fatal, and usually happens in a matter of days.

    Here's some reading to help you

    Ron Shimek's Sea Urchin article


    Either way: Good luck in re-establishing stability, in your urchin's environment.

    Read the article, return to forum with results of your efforts.
     
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