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.