Are there large coral reefs off the coast of the US?

Yes, there are large coral reefs off the coast of the United States, particularly in Florida and Hawaii. The Florida Keys are home to the only barrier reef in the continental U.S., known for its diverse marine life. Additionally, the Hawaiian Islands feature extensive coral reef systems that are vital to the local ecosystem and economy. These reefs face threats from climate change, pollution, and overfishing, making conservation efforts crucial.