I would like to add a page of official state sea shell emblem to my website. Lots of the states have chosen one. I have many other official state emblems complete, mainly through donated images. You can see all the pages of them by clicking: State Emblems. If you are in one of the states that has chosen a shell perhaps you may have an image. I know I could find them all on the internet but I don't work that way. If you don't have a shell pic. you may like to see all the other pages anyway, I hope you all do.
https://tpwd.texas.gov/fishboat/fish/didyouknow/coastal/whelk.phtml I did not know we had a state sea shell. Don't know about a photo but we are going down to the Gulf Coast for our anniversary trip in May, I might be able to get a photo of one in a shop for something.
Well, being from Scotland, I won't be of much help to you but I hope someone will have a photograph that you can use. By the way I didn't realise there was such a variety of turtles and tortoises - really interesting to see so many.
Nashville, sadly, doesn't have a State Seashell. But I found this link, which I thought might be helpful to you Kildale https://www.travelchannel.com/interests/beaches/photos/states-with-official-sea-shells
Thank you Ronni for taking a little time to answer my note. There isn't too many have a shell. Most of the other Nature emblems are in the site, except grass, and they are hard to photograph.