Okay, I'm going to share some information that resulted from several discussions on the beach about the Horse Conch in the middle of the photo. It is not actually a conch - nor is it a whelk, but a Tulip Snail, the largest gastropod found in North American waters. Like whelks, the Horse Conch is a carnivore and feeds on other whelks, conchs, and snails.
Thanks for this info! Beach finds are such a huge hobby of mine and I love learning about anything having to do with them. I have never seen a tulip snail shell on the beach there.. or anywhere. It is something. I'm sure I won't be lucky enough to find one, but sure glad you did!! Name it Idalia.
I did find one of those antique looking murex shells with the very pointy points on them. Mine was almost yellow and I could tell it was very old. It had a couple of holes in it, but that's okay. It's on my fireplace hearth in Frisco. Only one of those I've ever found which was last winter there.
Edit: I just looked up my murex shell pic and it looks like the one that you have below the tulip snail shell. Very interesting shell. I found it at the point and always find different items there! Haha! I also found a couple of discarded needles and other trash that I threw in my bucket to throw away! Must have been some druggies hanging out the night before! Yikes!