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Old 05-27-2005, 05:21 PM   #1
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could 'hiker urchins be scraping coralline off LR?

I read this about some types of urchins, and I've noticed a lot of my previously purple rock is now looking bleached. Thanks.
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Old 05-27-2005, 05:22 PM   #2
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Yep, Urchins eat Coralline.
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Old 05-27-2005, 07:31 PM   #3
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but.... they also end up passing it through their systems, and it actually will end up spreading the growth of it. Ever Since I added my urchin my corralline growth has skyrocketed.
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Old 05-27-2005, 07:33 PM   #4
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I have a big black one in the fuge. I am dying to add it to the main.....I dont know though.......
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Old 05-27-2005, 08:43 PM   #5
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I have two hitchhiker urchins: Spiky purplish ones (what are they, please?), about 1 1/2 inches across. Will these be likely to attack the coralline or anything else in the tank?
(Sorry if I'm hijacking a post: this seemed like a logical place for this question!)
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Old 05-27-2005, 08:56 PM   #6
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Ya, they poop it out right back into the system. Urchins eating coralline is way overblow.
Try target feeding them some little nori strips. I have had 4 urchins in my system for almost 2 years now, they barely put a dent in the coraline and just love the nori.
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Will these be likely to attack the coralline or anything else in the tank?
No worries, just beware of the spines if your can't ID them, some are venomous.
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Old 05-27-2005, 09:41 PM   #7
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also be careful of them dying in your tank, many times they release toxins... and many times will take the lives of many other animals in the tank... yikes!
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