Hitchhiker on Halloween Hermit

[Saltyreefer93]

Here is a pic of my Halloween Hermit. This spot on the back of its shell has grown over the last few months and I’m curious as if it’s good or needs to go. I’m sorry the pics are bad. I’m still learning how to photograph stuff in my tank.

 

[Sharkbait19]

Nothing is visible in the pics.
Turn white lights on and try to get a pic.