Is this mold in my shower?

Not going to lie, its probably been a few months since I've cleaned my shower so I'm hoping this is just built up grime. I was about to do a deep clean in my shower when I spotted it. Mold… or no?

Not going to lie, its probably been a few months since I've cleaned my shower so I'm hoping this is just built up grime. I was about to do a deep clean in my shower when I spotted it. Mold… or no?