Puzzling me for weeks...what is it?

[pirogovak]

This is killing me, does anyone know what this is? I have several of different sizes. Found in Charleston SC. Some type of dorsal fin bone...?

[pirogovak]

Other view:

[Randyw]

I could be wrong but I’m thinking some kind of vertebrae but from what I’m not sure

[Doctor Mud]

Yes I think this is a vertebra process or dorsal spine? from a billfish (swordfish or marlin)

 

I found something like this a while back in New Zealand Miocene deposits and wondered what it was.

 

 

[caldigger]

Here is some reference pics that were offered to me a short while back. Thanks to @Brett Breakin' Rocks

[Harry Pristis]

 

I just realized that I have a similar vertebra with process:

 

[Brett Breakin' Rocks]

Yeah  ...probably the  billfish Aglyptorhynchus sp. a common find if you hunt long enough in the Summerville / Charleston area. From the Oligocene. Thanks @caldigger  !! 

 

  Good team. Haha

[pirogovak]

Thank you @caldigger !