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sea urchins

Discussion in 'Reef Tanks' started by julie, Apr 27, 2002.

  1. julie

    julie New Member

    Does anyone know whether or not sea urchins can destroy live rock? I have a carrier urchin.
  2. old hermit

    old hermit New Member

    my black spiney urchin ate all coralline alage off my rocks. my friend had a pencil urchin that dose the same. it also stabbed my clown one time when the clown was spooked and swimming away very fast and slammed into it. i dont know about the urchin you have just those two. hth
  3. julie

    julie New Member

    so, do you still have them
  4. old hermit

    old hermit New Member

    i traded him back in but if your attached to it leave him. i dont know about having it with corals it may poke them and hurt the corals at the time i didnt have and corals. maybe someone else can help out with it. but i know it did eat my coralline alage very quick. it is now about 6 months later and just starting to grow back.
  5. susiepan

    susiepan New Member

    Julie,
    The only thing I know about problems with Urchins is that they can dislodge rock and corals fairly easy, and if in a small, confined area the can also pierce soft corals and anenomes..
    And that if you allergic to wasp/bee stings, it probably isnt a good idea to get the stinging kind, but pencil urchins are cool, and dont sting..
    ~Susie ;)
  6. blondenaso1

    blondenaso1 New Member

    I have an urchin in my tank. He came in on a piece of gulf LR and I never took him out. He is only the size of a quarter, and I rarely ever see him. They do eat coraline algae, but I figure this guy is to small to do any real damage. I did watch a TLC program about them and apparently thousands of them can leave a reef looking like the site of a nuclear blast after 6 months.
  7. susiepan

    susiepan New Member

    Wow Blonde,
    Thats good to know, I didnt know that, almost all the books I have, say they are reef safe...
    Thanks for that info.
    ~Susie
  8. wise

    wise New Member

    Congrats on your new aquisition!
    The main problem with urchins, is not them so much eating coralline (probably encourages growth), but rather them KNOCKING THINGS OVER!
  9. blondenaso1

    blondenaso1 New Member

    Does anyone know how fast these things grow? Like I said mine is only the size of a quarter and really can't move any of the rocks in the tank, but how long before I have a monster anemone nocking stuff over?
  10. striker

    striker New Member

    I had two hitch on my lr. They are long spiked and black. The first one was the size of a dime and the second half that size. 6 weeks later they both have grown 3-4 times their original size. Their growth rate is incredible. There is some coraline that has been eaten but they haven't caused any significant damage. I am afraid of them hurting my corals but as of yet there haven't been any problems. I don't have the heart to trade them in.
  11. byrself

    byrself New Member

    i have a fairly large black long spined one, and it's a coralline eating machine. great for a fish only tank, not desirable for reefs in my opinion... ;)

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