Rogue Hermit?

[bren_reef]

I have a hermit that came with my setup when I bought it a few months ago. It has grown quite a bit in the past few months and I have seen it going after my snails. The hermit is light colored and has stripes on it--kinda beige and white.

Here are some pictures--I have taken him out for now because I am suspicious of him 
Thanks,
Brenda