If you’re looking for an OK beach in the Florida Keys, Anne’s Beach in Islamorada (or Lower Matecumbe) might be what you’re looking for. It’s at mile marker 73 on the oceanside, and there is a little parking at either entrance. If you pass the first entrance as you’re heading south, there is another entrance 1/4 mile on the same side.
I have found a few tulips here and some augers and turbins. Nothing spectacular but it’s pretty and it’s fun. There is a boardwalk that will take you from one parking lot to the other through the mangroves. There are picnic tables and facilities. The water is shallow and goes out a good ways before it will get deep. Many shells have crabs in them here. They hang out by the mangroves.