Found these on a beach. Fascinated but clueless (well I know some are shark teeth but not what kind)

[LokisPetDinosaur]

Edited August 30, 2021 by LokisPetDinosaur

[Top Trilo]

The shark teeth are the only ones I'm sure are fossils. Are the 5th and 6th pictures of the same object? Since the 6th image has a symmetry that reminds me of an internal mold of a bivalve but it may just be a water worn rock, (wait for other opinions). The top three serrated shark teeth of the last image are of the genus Carcharhinus, the middle one looks to be from a Sand Tiger, if you can see remains of cusplets on the edges (see image below) I'd me much more confident. The large bottom one might not be a shark tooth. However another image of that one would confirm or correct.

 

Image of a sand tiger shark tooth

[LokisPetDinosaur]

Thank you for your reply! Adding a few more pics of the rock/potential bivalve. I didn't see any cusplets on the potential tiger tooth but I added a pic (best one I could get) to see if you guys see anything. Also another angle of the green one, trying to figure out if its a piece of coral or a land animal tooth. Thanks again for your help!

Also pic 3, this is the front side of it.

[Top Trilo]

As for the potential mold I don't have enough experience to be sure, you need someone with more knowledge. Even without the cusplets I'd say its sand tiger. It looks quite water worn and so they probably just got worn down to nothing. I can't identify anything else I'm afraid. Hopefully someone more knowledgeable will chime in soon

[bthemoose]

18 hours ago, Top Trilo said:

The top three serrated shark teeth of the last image are of the genus Carcharhinus, the middle one looks to be from a Sand Tiger, if you can see remains of cusplets on the edges (see image below) I'd me much more confident. The large bottom one might not be a shark tooth. However another image of that one would confirm or correct.

 

Image of a sand tiger shark tooth

I agree with @Top Trilo that the top three shark teeth look like Carcharhinus sp. There’s a possibility the leftmost of these could be part of a Hemipristis serra instead but I can’t judge from the photos.

 

The tooth in the middle looks like a lemon shark tooth (Negaprion sp.) rather than sand tiger.
 

I’m also not sure what the bottom one in that photo is. If it is a shark tooth it looks pretty strange but it may just be very worn/broken.