Diadema setosum

[heikki]

I have Diadema setosum, is it reaf safe?

As some one has eat acropora coral--

Tank is app 130 gal no algea, so may be there is not enougt to it, btw.. it has app. 11" long pins..

Sorry for bad english.. in from Finland far away:eek2:

[dc]

I believe they are, sometimes they can knock things over tho. They will eat coralline algae also. I'm not sure if mine was the exact species, but after it got too big I took it back to the store. It seemed like it was having a hard time moving around the rocks.

Here's an article on urchins. Urchins (http://www.reefkeeping.com/issues/2003-11/rs/index.php)

[ophiuroid]

The spines are long, hollow, barbed and become embedded in the skin easily. I don't generally recommend Diadema for tanks.