Interesting unidentified possible fossils found in the Aegean Sea

[AnnaNova]

Hello everyone,

 

Earlier this summer, I was diving at a beach in the Aegean Sea, and I found some very interesting things under the water that I was hoping you could help me identify. I know nothing of fossils, so please forgive me if these are just some random fish bones. However,  they are odd in appearance and appear to be made entirely of stone; they are extremely hard and do not feel like bones at all.

 

I am adding some pictures and will be grateful if you can help me identify them. This beach is a big treasure trove, and I have also found some very interesting rocks there that I am also trying to identify. I've posted these in the Rocks and Minerals section.

 

I am adding photos; at the bottom, you will also see pictures with the three items and references in centimeters and inches.

 

Thanks a lot for any advice you can give here.

[Fin Lover]

Welcome to the forum!  The first two are teeth (first one might be horse) but others can tell you more than I can.

[Fossildude19]

The third item looks like some sort of coral.

[oyo]

The third specimen is a coral, Balanophyllia. Most likely Balanophyllia europaea (Risso, 1827).