Sea urchin ID please

Discussion in 'ID Needed' started by Apollo, 5 Jan 2009.

  1. Apollo

    Apollo

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    Hello to all,

    Can someone help me in ID'ing this sea urchin.

    Closest resemblance I have been able to find is :

    Eucidaris metularia : Pencil urchin

    [​IMG]
     
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  3. jacquesb

    jacquesb Retired Moderator

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    Hi Apollo - look at "pencil urchin"....
     
  4. seank

    seank

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    NO, IT IS NOT A PENCIL URCHIN jACQUES. i GOT ONE FROM dEAN SOME MONTHS BACK, WILL LET YOU KNOW NOW. sORRY, DAMN CAPITAL LETTERS
     
  5. jacquesb

    jacquesb Retired Moderator

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  6. Shaun

    Shaun Retired Moderator

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    I also say it is a pencil urchin. well something similar.
     
  7. seank

    seank

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    Yes, sorry Jacques, I also just checked. Obviously because I used a name given to me by someone and never checked if the name was right. So, my mistake. The name I was told is: Banded Sea Urchin, but if I google it, it looks like this:

    [​IMG]


    The real one though is the one you mentioned, which is the: Eucidaris metularia, or also called a banded Pencil Urchin

    [​IMG]
     
  8. jacquesb

    jacquesb Retired Moderator

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    Cool Sean! That's what we call TEAMWORK! You have indeed hit the nail on the head! "Banded Pencil Urchin"! Coolio!
     
  9. seank

    seank

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    Uhmmm, think you were also wrong :whistling:, as it is not the Eucidaris tribuloides :thumbup:
     
  10. seank

    seank

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    But, according to Calfo's book, this is actually the Echinothrix Calamaris or known as the Hatpin urchin


    [​IMG]
     
  11. lanzo

    lanzo Sponsor

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    well that is a very nice critter you have there apollo;)
     
  12. Reef Maniac

    Reef Maniac MASA Contributor

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    I've owned a few of them over time (in fact, there's still one living in my sump somewhere), so here's a word or two of advise:

    1. They are BULLDOZERS and will knock down any loose coral or smaller piece of LR. If your rock structure is not very stable they could actually cause a rockslide, which could crack your tank...
    2. They eat algae - most any algae, which also includes coralline algae. In fact, mine preferred to eat the nicest pieces of coralline algae in the tank. They will also eat your macro algae that you want to have growing, but won't eat pest algae such as bubble algae.
    They have been reported as eating corals as well. I have never had this problem with any of the "pencil urchin" species, but it's worth keeping a close watch on them.

    Hennie
     
  13. Apollo

    Apollo Thread Starter

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    Wow ,

    Thanks guys for the replies. OK so my initial ID of pencil urchin was indeed correct.
    The urchin is still very small at this stage ( the size of an old 5c coin) and I normally only see him at night.

    He does not seem to venture very far in the tank , but remains close to where the largest patches of coralline algea are found.

    Hennie, my rocks are all secure so no danger of the urchin knocking them over at present.

    I just hope he survives. My tank is now 5 weeks into cycling and so far so good.
     
  14. Apollo

    Apollo Thread Starter

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    Hennie,

    Just a question. I was searching www.reefkeeping.com and according to the website the Eucidaris Metularia are carnivorous species.
    Don't misunderstand me... I am not doubting your statement, just seems to be a bit of conflicting opinions with regards to the diet of these urchins.

    Also, is there any special care that needs to be given to these urchins ? ( additives, additional feeding etc. )
    :)
     
  15. dallasg

    dallasg Moderator MASA Contributor

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    hi, have u got a thread in the members setup area so we can see your tank?
    i stay down the road from u in sunninghill
     
  16. Apollo

    Apollo Thread Starter

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  17. dallasg

    dallasg Moderator MASA Contributor

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    cool
     
  18. Reef Maniac

    Reef Maniac MASA Contributor

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    No problem - it's always good to check facts :)

    More correctly, they should be called omnivores, as they will eat anything, plants AND animals. As I warned in my post:
    Personally, I have had a few species of "pencil urchins" over the years, and I have never had any evidence that they attacked/ate my corals or any other higher-order animals in the tank. I suppose that they are much like most other animals we keep - individuals, with individual wants and needs. Some people have reported that they have successfully kept triggers, and one even a parrot fish, in a reef tank, but that does not take anything away from the warning that these fish are not reef safe...

    In a new tank, without much algal growth, it would be advisable to leave a piece or two of Nori in easily accessible places in the tank, at night. Apart from that, there is no real "must have" or "must do" requirements apart from general good husbandry, that is...

    Here is a photo of two which I've kept:

    [​IMG]

    Hennie
     
  19. dallasg

    dallasg Moderator MASA Contributor

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    now how do u transport those in a plastic bag, haha
     
  20. viper357

    viper357 Admin MASA Contributor

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    I had two or three pencil urchins in my tank, looked similar to yours but they were model citizens.
     
  21. Apollo

    Apollo Thread Starter

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    Hennie,

    Thanks for the info. I'll pop a wee bit of Nori into the tank tonight for the little guy.

    BTW: Really nice looking pencil urchins you had/have there
     
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