Indian Key Historic State Park, Florida Keys
Looks like a type of conch just not sure which one
Pair found underneath a boulder, with egg capsules I assume were theirs based on the proximity. The 3rd image shows the two adults as found, and the 4th image is looking down on the pool, boulder moved aside, showing the adults at left (right under water dripping off my camera), and the egg capsules at right.
First live specimen found in northern Indian River in 30 years.