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  1. #1
    Senior Member
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    Post Shedding Long Spine Urchin ?

    Hello,

    I am wondering if an urchin really sheds and if any other of you have the same experience.

    I hade my Long spine urchin for maybe now 2 years. Every 3-4 months it looses half of it's spines and then couple weeks after they are all grown back.

    By searching on the web I found some threads saying that they don't shed some say that they do shed.

    What do you have to say?

  2. #2
    Former Moderator a4twenty's Avatar
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    i've never kept one but i was under the impression that if they shed their spines it was a sign of poor water quality.
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


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  3. #3
    Senior Member Seahunter's Avatar
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    he's dieing...every time I've seen this in my tanks the urchin has died. I do hope you have the same luck you've had in the past and they grow back.
    225g SSB display, World Fish Custom Sump/Fuge/Filter, H&S A250-2X1260, h&S sulphur reactor, Reeflo Dart 3600g return on a wavy sea plus, 4X Tunze 6101, Deltec PF600, Octopus 3000, Aquazone Ozone 100,
    Lights: 2X250W 10K XMs, 1X400W10K XM, 6XT5s Al lights controlled by AC Jr.

  4. #4
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    Post

    It's all grow back again full size spines. Beautiful shiny blue color on the top. He is super active and cleans alot.

  5. #5
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    of the ones I've owned they've never shed but the spines do deattach very easily. is there any fluctuation in water quality? [not sure of your tank setup]
    if you believe that your water is good and he's healthy then don't sweat it.
    has it spawned yet? this is a good indication of a happy urchin.

  6. #6
    Former Moderator a4twenty's Avatar
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    Quote Originally Posted by devilmike90 View Post
    It's all grow back again full size spines. Beautiful shiny blue color on the top. He is super active and cleans alot.
    thats good to hear, next time he starts to lose his spines, you should double check your water quality. like all inverts, they don't like high nitrates. they are also extremely sensitive to low salinity and salinity changes. ( SG should be 1.025+ )
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


    My Gallery

  7. #7
    Senior Member
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    Yeap I did check the water quality last 2-3 times he did that and everything was fine. Ph,No3,No4,Ammonia,Salt,PO3,Orp,Temp.... He does not loose all it's spines but a good bunch hehe but he has been living with me for now 2 years and was always active.

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