quick question for you

[untamed]

I have three long-spined black urchins. One that hitchiked in with the rock. I suspect that they do eat some hair algae, but I wouldn't say they seek it out. I think they'll eat coraline as well.

[mark]

In my old tank tried both the long black spine and the tuxedo urchins (separately) for a Lobophora problem. Neither touched the algae but they sure did go through the coralline and I don't think they ate anything else.

To bad because lack eating of algae aside, they are rather interesting, just my coraline growth couldn't keep up.

[Der_Iron_Chef]

The long-spined urchin (diadema setosum) that I had ate all manner of algae, but it grew fairly quickly. I remember seeing online someone selling one the size of a basketball! So just be aware of that.

[marlincoral]

our tank was covered we got a pincution urchin (spelling doesn't count)he cleaned the tank really good

[niloc16]

awesome guys thanks. even if they do eat coralline that would be a good thing too. it grows like crazy in my tank

[Snappy]

I won't have one in my main display because they are bulldozers and "rearrange the furniture" so to speak. I have 2 in refugium though.

[marie]

I have a tuxedo urchin, I'm not sure he is good for anything at all other than the "wow is that an urchin" comments I get from nonreefers . But he doesn't hurt anything either so he stays