Healthy marine ecosystems mean healthy communities. 🪸🐟🌊 50 years ago, the U.S. ushered in a new era of ocean conservation by creating the National Marine Sanctuary System. Since then, it has grown into a nationwide network of 15 national marine sanctuaries and two marine national monuments that conserve more than 620,000 square miles of spectacular ocean and Great Lakes waters! The #ParkPassport app now includes national marine sanctuaries! Discover the wonders of sanctuaries right at your fingertips by downloading the app here to start exploring: apple.co/3Czut1H 📸: NOAA #SaveSpectacular #DiscoverWonder #NationalMarineSanctuaries #NMSA #NOAA