Hitchiker urchin

[Dekon]

This morning I was working near my tank, the lights were off and I see something moving near my glass I turn the lights on and low and behold there is an urchin in my tank. I never purchased an urchin and the last time I added any frags to my tank was over 8 months ago.
So, is it a good one or bad one to have in a reef tank?

Another shot.

 

[Chris A.]

It looks like a long spine but seams to have short spines, if so It’s good but it’s a bulldozer lol

 

[showard]

ill take it

 

[aresangel]

How?! I can understand a brittle star or maybe a bristleworm on a frag. But a urchin that size? Did you buy any large pieces of rock lately that would be my guess.


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[Chris A.]

He could’ve been wedged in a rock and ate his way out

 

[Dekon]

I have not added any rock since the tank was set up 8 years ago; and like I said, I have not put a frag or anything else in for 8 months. I am completely baffled by it's appearance.

 

[gurumasta]

Haha this is awesome!

 

[ReefAddict]

There has to more to this story. Lol


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[Dekon]

There has to more to this story. Lol


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Nope. No more to the story. Haven't seen it since I photographed it. But you can see on the coraline on the back glass where he has been eating.

 

[Dekon]

OK, so a little update on this. I finally had the time to swing by my LFS and show him a picture and it turns out this is a Rock Burrowing Urchin(AKA Shortspine Urchin) . Not totally reef safe. Caught him tonight and he has been banished to the sump. Didn't have the heart to kill him.