The crown shell is recognizable by it’s pointy ridges and striped appearance. While visiting the intracoastal waterway this summer, I saw these crown shells everywhere, but they were most often inhabited, not by the mollusk that made them, but by a hermit crab.
Many years ago my kids had hermit crabs as pets. This was mostly due to the fact that my daughter wanted to have one of every kind of animal on earth as her pet. We had to buy gravel to put in a small container for the crab and we had to provide empty seashells for it to move into when it grew. Now I wonder how the hermit crabs we had as pets lived at all, since the ones I saw in the wild stay completely under water. And it’s salt water. They are walking all over the shallows and could be in deeper water too I suspect.
They scuttled out of the way as we backed the boat in, and when we stopped at islands along the waterway the hermit crabs were there too. And more often than not they were in a crown shell.