✅ SOLVED What is this

[Khala]

Saw many pieces of this thing laying around the beach and was lucky enough to find a whole one, but i have no clue what this is and cant find it anywhere. Anyone here knows?

 

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[A2coins]

Welcome to tnet looks like a shell a few more pics to reference the size and the other side would be helpful

 

[villagenut]

It is called a Saw Toothed Pen Shell. Pretty common beach find, but usually just pieces of the broken shell.

 

[thisandthatish]

Ditto, pen shell. I was lucky enough to find one intact too, they are huge!

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[Khala]

Sorry. I thought the napkin was a goos size comparison. Now i know better for next time. On another note, thank you for telling me what this was.