part of a critter

[justleesa]

This was found diving off Oahu and we don't know what the heck it is or what it could be from. Looks like a claw of some kind
The size of this piece is about 1.85cm long and about 1.2cm wide on the open end. Any ideas what it might be?

 

[justleesa]

2 more

 

[knotical]

Perhaps it’s part of a mollusk. The shell wall seems a bit thick to be from a claw. How deep is the hole?

Could it be from something like the Black-tankard Angaria (Angaria melanacantha)?

Or a piece of coral?

Or maybe it’s a future puka shell. Nice pictures, btw.