Lol they wont eat holes in corals. I've had two of slightly different colours for a long time, maybe 3 years? And i've had a couple others for about a year in the past. Never had any problems with my rock or corals. I definitely would take it. They are entertaining for people, slow moving, dont knock anything over. I myself like them :)

Cheers,

Chris

Hah, I must have been writing as whatcanyedo posted...

None of mine have every damaged my silicone, and I rarely see them on the glass.

Cheers,

Chris

I used to have 3 different tanks so I tried the urchin in all of them but he kept going after the silicone... It was too weird to be normal so I assume that most are like yours and wouldn't do that.

Hmm, interesting and odd.