Mini Sub Underwater Adventure

Mini Sub Underwater Adventure

Cruise underneath the surface of the water on your own personal MINI SUB, a futuristic underwater motor-scooter. Experience the majesty of the Caribbean like never before on Key West's only Mini Sub Underwater Adventure!

These self-contained underwater diving vehicles are equipped with a large two-foot transparent dome that keeps your head perfectly dry throughout your voyage around the underwater reefs. Invented in the 1990's by a Florida-based company (Bell Aqua), the SUBs were featured on the television series "Sea Quest." These sea-horse shaped SUBs offer a safe, convenient method of exploring the vibrant reefs and coral gardens off the shore of Key West.

The reefs are teeming with a diverse array of marine life, including sea turtles, manta rays, mollusks, and a colorful spectrum of tropical fish. Have no experience scuba diving? Never even snorkeled? No problem. Our SUBs are the perfect method to witness the fantastic panoramic views below the surface.

Our knowledgeable and professional instructors will teach you everything you need to know about operating these user-friendly vehicles. First-time novices and diving veterans alike will enjoy this rare expedition. The bubble is large enough for your head and even your hands. Wear your eyeglasses and adjust them as necessary. Under the dome, you simply breathe normally without the use of snorkel tubes or regulators that are used in scuba diving. Bring an underwater camera with you and snap photos by holding your camera up to the outside of the dome. Propelled by a small battery operated engine, you maintain full control over your personal SUB.

Full precautions are taken by our expert divers to assure a safe and enjoyable experience. Air stored in a SCUBA cylinder is kept continuously flowing into your dome with a regulator manufactured by ScubaPro, the world's leading manufacturer of underwater life support.

It is your responsibility to make sure you are aware of and understand all restrictions pertaining to this tour before booking online or over the phone. It is your responsibility to ensure that you are medically qualified and within any limits listed below in order to participate in this activity. No refunds will be given to those who reserve a spot and can not participate due to the restrictions listed below. For more information please read our cancellation policy and terms and conditions page or call our staff with any questions regarding your ability to participate.


  • All guests must be 54" or taller in order to participate on the Mini Sub, due to the design of the machines.
  • This tour is not suitable for pregnant women and persons with history of stroke or heart attack, however these guests can still snorkel.
  • ALL GUESTS must wait at least 24 hours to fly after taking part in this tour