Shell questions

[Oogway the tort]

I was looking a my torts shell and I notice some marking I was curious about. I don't know of their scratches, or what they are. There are about 2 or 3 marking like this on his shell.Please help me.

 

[wellington]

Sorry, your pics didn't show.

 

[Oogway the tort]

Sorry, your pics didn't show.

Haha I fixed it sorry