Hitchhicker urchin. Good or bad?

[medwards]

Any one know what urchins are good/bad. Brought home a zoo rock today and while preping i find a urchin in a hole. Cant get him out with breaking the rock. Black body with white/yellow maybe spines. Any input would great. I dont know a thing about urchins.

[medwards]

Skyhigh anwsered this for me. Its a rock boring urchin.

[cg5071]

i found the same thing recently. i ended up killing it to get it off the rock. i suppose they would actually cause less damage than one who crawls around everywhere? if you dont mind a hole in your rock,lol.

[medwards]

The thought has crossed my mind, what about the rock. But we will play it by ear. Hate to kill anything without reason. Guess I gotta see how fast it bores through rock. If I cant notice who cares. But if he gets to the other side of the rock in a week hes got a problem.

[cg5071]

kind of cool actually. if you do a search for them you can see pics of bigger ones boring through rock. i just didnt know if i wanted one in my tank or not.