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Old 03-20-2005, 02:13 PM   #1
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Urchin

I got a small black spiny urchin on my live rock a few months ago. It seems to have gotten much bigger and has decided to attach itself to my xenia frag. Is this thing eating it? I tried to remove it, but its tight on the rock the xenia is on. What do I do, or should I just leave it?
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55 gal. reef. Coralife lunar lights 4 x 65, 120 lbs live rock. Remora skimmer, 3 power heads. 2 tank raise false percula,2 pajama cardinal,hermits, snails, Xenia, leathers, mushrooms, polyp frags, yellow sea cucumber, And last but not least - the miserable mantis.
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Old 03-20-2005, 02:16 PM   #2
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Mine is about 10 inches across and I've had him for over a year. He has never eaten anything but algae in my reef tank. He will crawl over the rocks to eat the algae but has never actually hurt any of the corals.
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Old 03-20-2005, 02:26 PM   #3
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Holy cow I've got at least 6 of these that 'hiked on my live rock... they're going to get to be 10 inches!?! Me thinks that will be a bit much for 30 gallons.

Should I remove some now or let them grow a bit & then offer them up to the LFS (and will they even want them?)
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Old 03-20-2005, 02:53 PM   #4
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Thank Kat - it has gone from the size of a pencil eraser to about 2". I just don't know that much about them. Can't wait to see what it looks like at 10".
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55 gal. reef. Coralife lunar lights 4 x 65, 120 lbs live rock. Remora skimmer, 3 power heads. 2 tank raise false percula,2 pajama cardinal,hermits, snails, Xenia, leathers, mushrooms, polyp frags, yellow sea cucumber, And last but not least - the miserable mantis.
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Old 03-20-2005, 09:45 PM   #5
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There is a picture of it in one of my gallery pictures. His body alone is probably 2 to 3 " across.
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Old 03-20-2005, 10:47 PM   #6
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I have a large one too, cool creature. When he is hungry, he comes to the front corner of the tank for a nori strip.
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Old 10-10-2005, 08:55 PM   #7
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he comes to the front corner of the tank for a nori strip
[/quote]
Will a nori strip satisfy them?[quote] Or will he eat my corals?
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Old 10-11-2005, 09:14 AM   #8
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They grow like crazy. I started with mine about four months ago when he was about the size of a dime... he is now about the size of a silver dollar or a bit larger. They don't eat anything in my tank but algae and have basically starved those fish in my tank that do eat algae.
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Old 10-11-2005, 09:19 AM   #9
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Should we target feed them with some nori?
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Old 10-11-2005, 10:01 AM   #10
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i have 2 pencil urchins I am thinking about doing something with... they eat so much coraline its not funny...

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75g w/ 30g sump, 160# LR, 60# sand: Inverts =18 turbos, 30 nassirus's, 40 blue leg's, 5 emeralds, 1 CBS, 1 skunk cleaner, 1 brown gulf shrimp? and various other LR hitch hikers yet un discovered or un-ID'ed
Fish=1 yellow tang, 1 yellow headed jawfish, 1 pink/blue shrimpgoby, 2 perc clowns.
Future fish = 1 sixline, 1 lawnmower blenny
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