Is this a fossil with a tooth indentation? If so what is it and what tooth?

[SeanMcD]

Found this on the beach of Wildwood Crest, NJ this week. Interested in what the item is but also interested in what appears to be a bite impression. Not much to go on but any information or thoughts are appreciated.  
 

Kind regards,

 

Sean

[ClearLake]

Welcome to the Fossil Forum!  This looks mostly like a rock to me with no indication of a bite mark, but there does appear to be a fossil buried within it (in the lower right of the last two pictures).  I cant hazard much of a guess on what the fossil is without uncovering more of it or knowing something about the age; could be a brachiopod, could be lots of things.

[SeanMcD]

Thank you for welcoming me to the forum and taking the time to respond. I was looking for shark’s teeth this week so it’s fair to say that I wasn’t approaching this find with an open mind. Much appreciated 

[Rockwood]

The mark is a mold fossil. It is hard to say for sure , but nautiloid shell would be another possibility.