Hermit crab in one place that normal?

[Prince]

Hello, I pick up a Halloween her it crab 3 weeks ago, he was very active and moving first 2 weeks and switch shells once already. Now he's behind one of my live rocks and hasnt moved in the past 2 days, is this normal for them?

There is plenty of shells for him to switch and plenty of algae and food from my fish for him to eat also.

Also have a algae blennie and 2 clown fish in the tank also.

Thanks in advance.

 

[ezy33]

It may be it's just molted and it's shell is still soft. Should be out by now.

 

[Ingy]

First time my Halloween molted he stated in the same place for 2-3 days. I thought he might be stuck because he looked wedged between 2 rocks so I moved him. He went right back and stayed there. Eventually I saw the molt.