UFOs (Unidentified Found Objects ;-)

[korell]

Hello shell collectors,

These are probably not shells at all, but I found them while looking for shells and seaglass on the Atlantic side of Eleuthera, Bahamas. I have looked at numerous shell, shark tooth, and "general beach find" identification guides, but have not been able to find any pictures of these anywhere. Google reverse image search returns "Teeth" and brings up a bunch of shark tooth pictures. They look a bit like dull shark teeth, but feel and sound (when shaken in hand) more like shells. Also, I have never seen shark teeth colored/patterned like these. They also resemble beaks of some type, like sea turtle or octopus beaks.

Does any of you have a clue what these are?

Thanks in advance!

Sacha