This reputable dive operator has been in the business for over 30 years and is Key West's largest professional diving center. In addition to reef, wreck and open water excursions, the center is fully certified to teach SCUBA. You can rent equipment or have your own gear serviced here.

This company specializes in night dives and wreck dives. Up to 16 divers can travel on their 40-foot custom boat that will whisk you to sites along North America's only living coral reef. A smaller 26-foot vessel ferries parties of four to more remote sites east and west of the island.

This company offers eco-tours via kayak and snorkel. The trips departs at 9am sharp, returning around 3pm. The price includes kayak rental, snacks, drinks and tour of the Sugar Key or Geiger Key mangrove swamps that are located just north of Key West.