hermit crab question?

[geopod]

Nano,

Add a couple of larger shells than the ones you have in there.I have found in my 90 gal.As the crabs are fighting for shells.One eventually gives up and moves out.I found him crawling along the rock without a shell and he moved into a hole in the rock.He is still there and its been since April.Mind you I have been away from home now since End of June and my wife says he is still in the rock.I think he is too scared to go back to the shells.But just like the others say as they grow they molt and the molt actually looks like a dead crab.

george