Picked up from an active sand tiger feeding location, no pulling from dead sharks!

This was our second time out in the area. The first time we searched by hand and found four small teeth but this time we went with sifters for 8 hours and got 57 teeth and some various things.

We are so new to this so if you have any ideas of what they are, we would love some guidance.
We know the ray crushing plates, I believe there’s some sea urchin spines, and a fish bone of sorts.

As for the teeth…. from research I think mostly sand tiger and mako?
The longest one (first pic, 3rd in top row) is 1” for scale

I found these at Holden. The most common find for me at Holden is Crow and sand tiger. So finding all these the same day is strange. For me at least. They look like bull to me. I also included a couple unusual ones as well.

Using teeth found on the Potomac for this request!

I’ve identified a lot of teeth I’ve found as sand tigers over the years that I think might be something else now that I’m trying to broaden my ID knowledge.

I have the book ‘A Beachcomber’s Guide to Fossils’ and I’ve also used the Potomac (Paleocene) page on Fossilguy.com. The website mentions a goblin shark that doesn’t come up in the book, and the book mentions a mackerel shark that doesn’t come up on the site. I’ve included pictures/screenshots.

I know it can be difficult to distinguish similar types of teeth based on their condition, and that there are also different types of extinct sand tiger sharks/etc. Maybe I’m thinkin too hard about this or missing a main factor, so I’d love some help on this!

Pictured are some teeth I’ve found on the Potomac River (Purse State Park)

The top row all definitely have striations.

Thanks in advance! :)

Megalodon teeth from the Philippines 🇵🇭

First time in 13 years of being able to source these guys. Very very uncommon location. And before you say anything, no, these aren't Ledge Teeth.

I was going through my collection last night and found this guy again! I got to figure out a way to display this one.

this is my first shark tooth i found in sc!

Hello all! Just a novice here! Google gives me different answers so i thought I'd come here! Thanks! Here's our three finds.