Is this pottery?

[GrouseMan]

Is this pottery or something else? Found on an NJ beach close to lithic artifacts. The curvature and grooves are throwing me off, plus I’ve never found pottery before, so I don’t know what I’m looking for or at.

 

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[Relicgrubber]

Nope. Looks like a coconut skin...

 

[TreaShore]

I also think it is a piece of coconut. It appears fibrous, especially in the 2nd image, left side and the V shaped patterns as well.