Doing a little maintenance on my sump and saw this guy! I have three different types of ocean live rock in my sump so I’m assuming he came from one of those but wondering if he’s helpful or harmful!
What type of Urchin is This
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Crabs McJones
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Looks like a pencil urchin, munches on coralline and certain types of algae
tbrown
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+1 Pencil Urchin. They're good critters but can become coral eaters. Mine never ate a live coral but it has eaten coral skeletons.
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