Silver shell pendant necklace, 18-inch chain

I lost my silver shell pendant necklace yesterday around 3pm near the Biloxi Lighthouse on Beach Boulevard (US 90). It's an 18-inch silver-tone chain with a small shell-shaped pendant that has a tiny starfish engraving on the back, and the lobster clasp shows a little wear. The pendant is about an inch tall and the chain has a faint coffee stain near the clasp. It means a lot to me—it was a gift from my grandmother and carries sentimental value. If someone finds it, I’d really appreciate getting it back.