Good Or Bad Urchin?
 

I was doing a water change today and I happen to come across this little urchin... which is very weird cuz all of my rock I made myself, musta hitched hiked on coral like the green BTA I found. Hes purple with blunt, sparse tips.
But anyways I have him trapped at the moment and I was wondering if hes a good one to keep or will he munch on all my corals and should not be realeased?

It is very cute!:biggrin:

Lol cute things tend to do alot of damage in my experience

Looks like a rock borring urchin.

http://www.magnergraphix.com/ScubaPi...ix/Urchin.html



Chris

ya thats what he looks like except purple... says they bore dens in corals and rocks which is no good

I always thought porous rock was beneficial. That little critter doesn't look like he'd do that much damage. No experience with these guys, I did have a couple of pencil urchins, but they expired some time ago. Wouldn't mind a blue tuxedo urchin in the future.

unwanted urchin
 

send it to me and i'll cover shipping cost. postal code V5N 1R7

I have one in my sump, awesome little guy

Lol why would you have wanted it? Its gone, my friends trigger made a meal of it as soon as I found out that it would could eat holes in my corals

I have a rock boring urchin (Echinometra lu****er) in my frag system with... lets just say 40 different species of coral because I don't feel like counting. I've had it for probably three years now and the only problem it's given me is that it will eat at the silicone seam on a glass aquarium. Which is why its in my frag trough. In all of this time its never actually tried boring a hole in any of my rock or coral. Without any silicone it seems to be quite contempt to eat coraline algae all day and leave everything else alone.

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.