Fossilized upper Hemipristis Serra tooth
Fossil, not present-day sharks. https://www.fossilguy.com/sites/calvert/index.htm
I was given this tooth by a local while out beachcombing in the morning, he said he found it washed up with the shells but not sure if that was true or if he was just trying to get us excited about beachcombing
Not sure what kind of shark tooth this is