5.5 month old longspine urchin

[PeterEde]

He was just a few millimeters dia when I first found him

 

[blaxsun]

That's a happy, healthy urchin.

 

[DaJMasta]

The early growth stages after settling for most urchins are very fast, I had some short spine rock urchins come in on my live rock smaller than a pea each that were fully grown in about the same amount of time.

 

[PeterEde]

That's a happy, healthy urchin.

I read water must be good for an urchin to survive. I'm happy he has but it's getting too big now

 

[WVNed]

I have had 3 for a couple of years. I rather like watching them. You have to be careful sticking your hand in the tank with the lights off. They are invisible then.

 

[PeterEde]

I have had 3 for a couple of years. I rather like watching them. You have to be careful sticking your hand in the tank with the lights off. They are invisible then.

Or with lights on ;)
I got spiked twice in a week. Lucky no spines snapped off in me

 

[blaxsun]

I read water must be good for an urchin to survive. I'm happy he has but it's getting too big now

I've got a pair of tuxedos that are doing really well, so apparently I have good parameters.