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Old 01-17-2005, 01:15 PM   #11
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The spines will regenerate. They're a defense mechanisim. They are often barbed. This way when something bothers them, the spine pierces the attacker releasing venom. It then breaks off to stay with the attacker and irritate them longer while the urchin escapes.... as quickly as an urchin can.

here's a picture of mine. He quickly out-grew my 55 and had to be returned to the LFS. His spines were easily 9-10" and a body 2-3" in diameter.
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Old 01-17-2005, 01:29 PM   #12
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Wow Billy, he was cool.
Sorry he had to go.
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Old 01-17-2005, 01:31 PM   #13
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yea me too... he was one of the first critters I put in my tank. Got 'em when he was quite small... probably 4-5" spikes and 1-2" body... hey grew very quickly!
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