What's attacking my Mandarin??

[justahobby]

I have had a male mandarin for about two or three weeks. He doesn't eat frozen ....yet, but has a full belly and is constantly hunting. He is actually fatter than when I bought him. However I noticed today he is missing ALL his fins. I never imagined a blue leg hermit causing such a problem but he is my only culprit. So does anybody have any ideas or does this sound phesable? Hermits are the only thing I have in the tank besides coral and snails. Is there a disease that isn't visible causing this? Thanks to all.

PS: One of the hermits is rather large...he is using a big nassarius shell to give you an idea. And I will be removing him as soon as he is found.

[Joe31]

The hermits will do that, and especially when the lights are out.