Fossil Identification Help

[Loon]

Hello everyone. I've recently decided to try and decipher the identity of these fossils I received as a child; my father's friend gifted them to me, and said they were Spinosaurus teeth.







Researching spinosaurus teeth has dissuaded me from thinking that. Now, I don't know what they are; I'm not even genuinely sure they're not fakes, I hope not, but still. So if anyone could help me in identifying what these are/ what they belong to it would be very much appreciated.

[DinoToyForum]

Onchopristis

[BlueKrono]

Same as Killekor had:
http://dinotoyblog.com/forum/index.php?topic=5113.msg151479#msg151479

[Megalosaurus]

So interesting!

[Loon]

Thanks everyone for the help. Not dinosaur teeth, sure, but very interesting, probably more interesting honestly.

[Halichoeres]

Cool! I mean, fish > dinosaurs