Interesting teeth

The last one isn't a mako. Maybe a pathological Carcharinus sp.???

its not a pathological Carcharinus sp. but it is a Carcharinus sp. tooth

The first tooth is probably a lower posterior Hemipristis. They are only serrated on the one side. A sickle-fin weasel would be an amazing rare find, but I'm not sure this is it.

The more I look at the root differences, the more I think you're right. I will keep looking for the sickle-fin weasel. Thanks for the input. I have edited the caption.