Marine life beckons. Key West reef snorkeling is perhaps the best coral reef access in the world. Part of the Southern Florida Archipelago, Key West offers infinite snorkeling opportunities for marine sports aficionados. Just seven miles from the coast, Key West’s offshore environment is filled with an amazing tropical eco-sphere of fish, corals, jellyfish, sea anemones, sponges, crabs, sea turtles, lobsters, manta rays, sharks and other marine life.