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Spiny Urchin: How big is too big?


frogsickle

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Hey Folks,

I have a black spiny urchin Diadema savignyi and I'm afraid its diameter may be getting outta control. He's about 9 inches across at this point (no pun intended) and he may be getting a bit too big for the 90 gallon tank. How does one handle a critter that's outgrowing its environment?

Thanks for the advice, in advance.

-Frogsickle

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ok... so the body is probably <2"... I think it will be fine. It may try and get into places breaking off spines, but its typical. Mine was gone for about 2 months at one point and just showed up one day. It got behind the rock work and was chowing down on coraline algae back there.

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WI have one that is six inches from spine to spine. I just moved it my fuge. I have been reading they can get a taste for acros. Not mention it hurts really really bad if they poke you. I had one that poked my knuckle and I had to have surgery on it. It went into my knuckle sheath and stayed there for six months till my finger stopped working.

Edited by bige
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WI have one that is six inches from spine to spine. I just moved it my fuge. I have been reading they can get a taste for acros. Not mention it hurts really really bad if they poke you. I had one that poked my knuckle and I had to have surgery on it. It went into my knuckle sheath and stayed there for six months till my finger stopped working.

OUCH! They do seem to have a knack to know where I'm working in the tank, and immediately head that direction. Been stuck a few times but nothing that bad.

They grow fast too!

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