For some reason a few of my hermits hang out around the bases of my two cabbage leather corals. I figured they were there for the mucus from the cabbage leathers' shedding but it seems like even when the corals aren't shedding they just stay close to the base and appear to be eating algae off the rock at the bases. Sometimes they walk across the corals though, folding them over and such. They're not eating the corals but the hermits have kept them from extending polyps for a couple of weeks now and both are shedding much more than normal. I do know these particular hermits like nori enough that they left the cabbage leathers alone the whole time it was in there the other day. Short of yanking the hermits is there something I can do?