Possible Marine Vertebrate Fossils?

[joceybird]

Amateur fossil hunter. Live in North East Texas, Upshur County very near Camp County, and I found these specimens on our farm, in various places, not all together. From what I've read, this area is Cenozoic > Eocene.

I'm noticing some similarities between them, but being a novice, have no idea the orientation they would be positioned on the animal. If I did, I could google lateral view, medial, or caudal view etc, and have a CHANCE of identifying them. But, I don't, so have the proverbial needle in a haystack here The smallest specimen is roughly 3/4" across, and the largest is roughly 2" across, as pictured. Clearly a variety of bones, but similar in that they are thinner on one side and either have a rounded or abruptly thicker side. Would greatly appreciate any pointers. Thank you!

[Xiphactinus]

joceybird - welcome to the forum! Can you take some different angles? I'm not seeing anythng that looks like bone, but other angles would be helpful.