Help me identify shark tooth

[Kdsharky]

Can anyone help me identify what kind of tooth this is. My son and I found it shell hunting off a beach in riviera maya. Thank you:)

[sharkdoctor]

Welcome to the Forum! I'm not seeing a shark tooth. It seems that you have a suggestively shaped fragment of shell. 

[ynot]

Welcome to the Forum!

I'm not seeing a shark tooth, either.

The holes are from burrowing sea critters that live in shell material.

[Mark Kmiecik]

Heavily weathered fragment of a shell with borings.

[El_Hueso]

Very cool piece though! I would keep it if I had found it