Short Spine Urchin Hitch Hikers Help

[morspeed]

I have done some research and found that these urchins eat coraline algae but do they eat zoas and micro feather dusters? Reason I ask is I have about five of these little guys in my 250 tank and I had a rater large colony of micro dusters in a rock cave and I notice a lot of them missing today and an urchin was under there. I did turn up flow in the tank and that particular corner has been getting monster flow so that is a possibility as well but I was wondering if anyone else has experienced this? They do eat coraline algae as well right?
Thanks

 

[150Ron]

They do eat coralline algae but not sure about dusters

 

[sam.basye]

I have two in different colors and neither will touch the zoas I have. Don't have any feathers dusters, so can't help you there.
They are also referred to as rock boring urchins and I have proof they will eat their way through soft rock. There's a big hole missing from one of my dead barnacles and I'll occasionally find some foam floating at the surface - I made a foam wall for my tank.
I wouldn't worry about them.

 

[Betta132]

They won't intentionally eat micro dusters. A starving one might try, but unless the dusters were covered in algae, the urchins shouldn't be interested.

 

[morspeed]

Thanks for the help. I also talked to my LFS and he said they probably just mowed them down when walking. I did notice you could tell where they have been on the rock. They are eating my coralline because I have no other algae in mt tank. I swear they keep multiplying. I have counted at least 9. 4 or five about half the size of a golf ball and the rest babies. They keep coming out of the woodwork from where? I don't know. I have banished the bigger ones to my sump for now. I will donate to my fish guy. He said he would take them.