Flaky spots

[Megsican26]

What are these spots on my babies shell? I’m so sorry if this has been posted. I’m at work and my adhd will take over if I attempt to search lol. Thanks in advance

 

[Megsican26]

 

[Megsican26]

This is when I got him vs now

 

[zovick]

This is when I got him vs now View attachment 394463View attachment 394464

There is some kind of shell damage taking place. Perhaps a fungal infection.