Is this a shell?

[Metallicakid418]

Out looking for sand dollars today at plum island with wife and kids and found this i was wondering if its a type of shell thats worn down?

 

Amazon Forum Fav 👍

DR.ÖTEK Metal Detector, Waterproof Gold Detector, Pinpoint & Terrain Modes, Professional Metal Detector - Grab it through Amazon!

[Ga_Farm_Hunter]

I do believe that is a shell, I myself have found some of those before on Myrtle Beach, SC.

 

[nhbenz]

I would guess that to be the remains of an oyster shell.

 

[TheCannonballGuy]

I believe NHBenz is right... it's a seriously worn-down oyster shell.