whats the best kind of sea urchin to get

[EmilyB]

I have three urchins in the 230g. Two tuxedo's and one long spined.

I've never seen the long spine on the rock as much as the tuxedo's but perhaps he browses at nite. I suspect he knocks some frags over from time to time, but my decorator crab does too. Urchins are very cool, I myself wouldn't be without them.