Urchin bleaching LR??

[adamsaranluke]

I got a short spine urchin a couple months ago and I am wondering if he could be the reason that some of my lr looks bleached. It seems that everywhere he goes he leaves the rock white for a couple days, then the coraline starts to regain color and rocks fade back to normal. Normal?

 

[mcintosh]

Totally normall. The urchin is devouring any algae in its path, including the coraline algae on your rock. He will eat the rock as well to get at the algae.