is this possible shell rot?

[Newbie Allen]

It seems that my RF plastic may have a possible pit (bottom left of shell) but I am not to sure, any thoughts on this being shell rot, if so what should I do?

 

[wellington]

I don't see anything to worry about.

 

[crimson_lotus]

Nice looking shell! I do see that little pit thing you were talking about but I wouldn't worry, either.

 

[naturalman91]

looks like a healthy shell to me

 

[Yvonne G]

It's hard to tell from a picture. When you dig at it is it soft? And does it smell?