Shell or bone? homdel NJ

[SarahtheIchthyornis]

(distance between the two blue lines is one cm, photos taken under a dissecting microscope)

Found this strange object in a creek in NJ, it is translucent, very smooth, and curved.

My first guess for this object was  a fossil bone fragment, but this may come from the shell of an invertebrate instead, (which would be more likely at this site)

Does anyone have opinions on the object?

thanks in advance! 

[SarahtheIchthyornis]

showing translucence

[brad hinkelman]

looks like a drum fish tooth

 

[Coco]

Looks like a broken Picnodont tooth (fish).

 

Coco

[Trevor]

More specifically, this tooth likely belongs to Anomoeodus phaseolus.

Here are some other examples:

https://njfossils.com/anomoeodus-phaseolus/

http://www.fossilsofnj.com/skates_rays/drumfish.htm

 

Here is a photo of some more: