crabs eating coral??

[frankb]

I just added some frogspawn about 3 days ago and noticed it was drooping a bit. There were two blue leg hermit crabs on the stalk that seemed to be munching away.
I then noticed a nickel size hole on the back of the stalk that the crab was sitting in!
I do not know if the hole was there already (I hope so). I have heard of things eating the polyps but is it possible the crab ate a hole in the stalk?? I may have been just eating algea of the stalk but I want to be sure...

 

[mlm]

I have heard lots of bad things about blue legged hermits. Most people tend to stick with the red leg scarlet hermits.

 

[kris walker]

And just to chime in, the Baha Red Leg hermit, which is different from the Scarlet Reef Hermit, can also be troublesome based on what I heard.
sam

 

[chevron tang]

The blue legs could be eating the coral. I've had good and bad experiences with those hermits. The first time I tried them they started eating my colt coral so I got rid of them. I finally decided to try them one more time and have had a few in my tank for about a month and they haven't hurt anything.