(787) 644-7112

Hours of Operation
Monday — Sunday, 9:00 a.m. — 11:00 p.m.


Biobay Tour

Once-in-a-Lifetime Bioluminescent Experience!

At the prescribed time, we meet on the dirt parking lot close to the fisherman dock in Esperanza on road 996Your Eco interpretive guides call the group of kayakers together for a briefing session covering basic kayak handling, rules of the road and the importance of keeping to a minimum any disturbance of the pristine environment of the bioluminescent bay.

Explore these amazing organisms up close in our  group excursions led by knowledgeable interpretive guides. Learn how this fragile and unique ecosystem maintains a perfect balance of life, and what we all can do to protect and preserve such a special place on planet earth!

One of our lead guides in his kayak
One of our lead guides awaiting kayakers
clear bottom kayak

Our approx. 2-hour and 15 minutes (including check-in) guided bio bay CLEAR BOTTOM KAYAK excursion  includes interesting interpretations about the reserve’s fragile ecological system, star constellations, and a fascinating encounter with millions of bioluminescent organisms. As you glide along in your kayak, experiencing this unusual nighttime phenomenon and seeing how fish light up their path like shooting stars in the water, you might get the feeling that the dark Caribbean sky is jealous of the glowing water below as it tries to catch up with streaking meteors and impressive constellations!

“Bienvenidos” to a unique and rare Bioluminescent Experience, an adventure not to be missed while on Vieques Island! Join JAK’s fully guided night trip into one of the most amazing natural phenomena of the world with our tandem CLEAR BOTTOM KAYAK! This pristine ecosystem teems with astonishing marine life, inhabiting a secluded bay protected by mangrove forests. You will meet our glowing friends, the Pyrodinium bahamense, a microscopic plankton capable of producing natural light at the touch of your hand!


We love to talk directly with our clients! For availability, trip times and reservations, please call us at (787) 644-7112

We don’t book thru TripAdvisor, VIATOR or other Third- Party Site.

Please be prepared with the following information:

  • Number of people in your group, email address
  • The name of your lodgings in Vieques (see Things to Know below). 
  • A Visa, MasterCard or Discover number to guarantee your reservation. SPACES WILL NOT BE RESERVED WITHOUT A CREDIT CARD. (See Cancellation Policy FAQs).
  • You should receive an email confirmation of your reservation with directions. If it didn’t arrive, check your SPAM folder, then give us a call and we will resend it. Please see our cancellation policy FAQs for more details. 

Cancellation Policy FAQs

Credit card numbers are held to guarantee your reservation against our cancellation policy: JAK Water Sports has limited bio bay tour spaces. Once your reservation has passed the cancellation policy, we do not issue refunds. Please call us to change or cancel your reservation before your courtesy period runs out. We will always send you a cancellation confirmation. Reservations booked the day of the tour are nonrefundable.

To avoid no-show charges for groups of 4 or less:
  • Cancel or change your reservation prior to 10am the day of your tour at no charge!
  • Arrive by your check in time to depart with your tour group.
  • Fill all your reserved spaces. We will charge the card on file for all unused reserved spaces at the full rate.

For groups of 5+:
  • We charge the card on file for all large groups 48 hrs. prior to your tour.
  • Need to change or cancel your group reservation? Call before 48 hours and we will happily make changes at no charge!

Groups of 4 or less persons will pay at check-in. If you are paying with the CC on file, please bring it with you for both your and our fiscal safety. You may optionally pay with cash.

Groups of 5+, we charge the card on file 48 hours prior to your tour date and time.

It is the client’s responsibility to arrive to Vieques island on time for their reserved activities or Bio bay tour. Travel delays to Vieques do not constitute a reason for refunds. 

Our recommendation is to fly into Vieques and/or to travel one day prior to reduce your stress and enjoy an extra Vieques activity or beach time! If you are a stress junkie and will travel to Vieques the same day of your tour by the Puerto Rico Ferry, we highly recommend traveling in the morning to avoid delays especially during the high season of December through April.

You may check ferry departure times and purchase tickets at PuertoRicoFerry.com. Please note, PR Ferry only sells ~20% of the tickets online. All other tickets must be purchased at the terminal window. Please read their cancellation policy as we provide this information as a courtesy.

The tour is not cancelled on rainy days, as Puerto Mosquito is almost completely enclosed by a mangrove forest so it is still safe and the water is still glowing under the rain. We make all the determinations about weather cancellations however, so please call us according to your applicable courtesy period  if you decide the weather might not be acceptable, as you will be charged if the trip goes out and you do not cancel your reservation according to our cancelation policy. 

JAK Water Sports and Rental reserves the right to cancel or reroute any tour due to acts of nature or unforeseen circumstances that would hinder our ability to safely run a trip. If we are unable to provide you with another trip, any money paid will be fully refunded. 

Things to Know About Your Tour

On the south side of Vieques Island, in Esperanza, off of State Rd 996 (Google Map) on the dirt parking lot near the fisherman’s dock.

Insect repellant is optional. If you use one, please select a Deet-free kind to minimize bay contamination and harm to the bioluminescent dinoflagellates.

Clothes that can get wet: Long sleeve top (temps drop at night certain months of the year) and shorts.

Flip-flops or Crocs. To help keep our clear bottom kayaks clear and scratch free, you will remove your shoes on the shoreline. We will help you to store them in the kayak.

Please leave large bags at your lodgings as there is not storage on the kayaks or the meeting place. If you bring a small bag, please take precautions to keep it dry as this is a water activity.

YES! Vieques Island is a separate island from the main island of Puerto Rico and the tour returns after the last ferry departure.

Need a place to stay? For ideas, try:
  • Vieques Insider Magazine for guesthouses and hotels
  • local real estate agents who are also property managers
  • Airbnb

First time kayakers are welcome and as most of our clients are first timers, we provide a kayak briefing and paddling instruction before every excursion.

Our kayaks have a combined weight limit of 385 lbs.  If you need special accommodations, please inform us at the time of your booking so that we can provide them. JAK Water Sports reserves the right to assign kayaks as needed.

JAK Water Sports operates in compliance with PR DNER regulations. There are no tours of the Vieques bio bay the day before the full moon, the day of the full moon, and the day after the full moon each month. Some months have two full moons.

This tour takes place in a natural environment. Although rare elsewhere, the bioluminescent phenomenon can be seen year-round in Vieques, however, all natural ecosystems are dynamic and their conditions can vary. Puerto Mosquito is known as a bright and stable bioluminescent bay, but the intensity of the glow may fluctuate due to unpredictable natural changes beyond our control. Most important – the glow is always there! ENJOY THE SHOW! 

Safety and Physical Condition Restrictions

Please help us make this a pleasant experience for all! For safety and health reasons, those under the following conditions are not allowed to participate in kayaking excursions with JAK Water Sports.

  • children under 4 years of age
  • women pregnant 6 or more months
  • those who have epilepsy, back problems, heart conditions, dizziness, recent surgery
  • any other condition that may put life (yours, our guides, or other guests) at risk