dwarf urchin safe???

[REEFRHEAD]

ok so ive had this rock full of ricordeas for about 2 months and then all of a sudden one morning when the vhos went on i saw this little urchin well at first i only got a view of its spines, so the spines are like a purplish color with green tips and then finally i just got a good view of the urchin because it finally left the rock it was under, and the urchins body is basically black and where the spines connect is almost a light grey whitish ring, no "eye" and the center has a almost crater. ive watched this little guy for a while and so far i havnt noticed anything harmful it has done now i dont mind if it eats some coraline or anything just making sure its not some evil little hitchicker i dont have a good enough camera to take a pic yet as i spend all my money on more corals and other needed equipment that i never have enough of BTW the urchin is about the size of a quarter. thanks all

 

[AudioAdict]

My friend has had one of the same kind of urchins in his 100 gallon SPS for over a year and nothings "wierd" has ever happened to suggest that it is not safe.

Is this the one??

 

[rssjsb]

Looks like a brown short-spine urchin. Sealifeflorida.com sells them, so if your rics and rocks are Caribbean in origin, it could be a match. Wetwebmedia seems to think they're ok.

 

[REEFRHEAD]

ya he looks alot like that little guy but the white rings are as bright as that and the tips are a little more noticable green and the spines more purple but it also looks younger than the on in your pic audioadict... thanks for the info i guess ill keep the little guy i dont mind him i just diidnt want him crawling into the huge rock formation without knowing he wasnt going to create any rukkus

 

[Opcn]

the colordifferences you described fall wll withing the broadnatural coloration for these guys.