Pincushion Urchin, Blue Tuxedo

[Seiryoku]

Quick question about these guys.

What is the smallest tank you can comfortably keep one of them in? The tank will probably end up with some beginner coral and a fish (maybe two).

Thanks ^^)b

 

[Sebastiandacrab]

i keep my 2 in my 60 but im sure they could go in a smaller tank

 

[Seiryoku]

I'll either be setting up a 10g or 29g. Do you think one would be ok in a 10g, or is that a bit to small?