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Bioluminescent Bay (Mosquito Bay)
Bioluminescent Bay (Mosquito Bay)

Bioluminescent Bay (Mosquito Bay)

Puerto Mosquito, Vieques, Puerto Rico

The Basics

Any contact with the water—by the boat, a paddle, or a part of the body—makes the water glow bright neon blue and green. Jump in for a neon-lit swim, cruise over the water in a pontoon boat, or board a kayak to paddle through the bay. Nighttime kayak tours typically allow you to learn about the biology of dinoflagellates and their interaction with the Vieques ecosystem.

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Overnight Bio Bay Kayak Tour in Vieques Island
Overnight Bio Bay Kayak Tour in Vieques Island
$55.99 per adult
Traveler Favorite
Magical Experience
Magical experience. Our guide - Adele - was wonderful - warm, funny an informative. I’m adding a few word’s because the review guidelines demand more
James_H, Aug 2022

Recent reviews from experiences in Vieques

star-5
Fun experience during new moon
Hedley_P, Aug 2022
Bioluminescent Bay Kayak Trip from Vieques
Amazing bio-wonder with witty and knowledgeable guides. Small snafu with kayak, but guides were safety conscious and fellow visitors rolled with it - good to see in 2022! *Note: the water is only about 4” deep. Don’t worry too much about paddling out there in the night. PS TIP YOUR HARDWORKING GUIDES. :)
star-4
A magical night
Ruth_H, May 2022
Overnight Bio Bay Kayak Tour in Vieques Island
The tour guides were very service and safety oriented. The view at night was stunning with the starry backdrop. The bay was magical.
star-4
Kayaking with no moon
margaret_m, Aug 2022
Overnight Bio Bay Kayak Tour in Vieques Island
This was a very good trip that went seamlessly. My four star rating was based on lack of instructions on what we should have done if we got separated from the group. It was VERY dark
star-5
5/5
Jesse_C, Aug 2022
Bioluminescent Bay Kayak Trip from Vieques
Great guides. Saw the dinoflagellates. Half moon did not hurt the experience much because these guys bring a large tarp to simulate total darkness. Glass bottom kayak was cool.
star-5
Vieques bio bay
Holly_E, Aug 2022
Bioluminescent Bay Kayak Trip from Vieques
Great guides. Beautiful bay. A must do. We had a wonderful night. Very informative. I’d recommend this excursion to everyone.
star-5
Magic…
Marc_R, Aug 2022
Overnight Bio Bay Kayak Tour in Vieques Island
A wonderful experience, with a fun and knowlegable guide, even if the moon gave too much light…magical water!
star-5
Great guides, easy going tour
Jeff_G, Aug 2022
Bioluminescent Bay Kayak Trip from Vieques
Taking our time and seeing the fish underwater made this tour just outstanding! The guides were great, the equipment was top notch.
star-5
Excellent service from...
Trent_L, Aug 2022
Overnight Bio Bay Kayak Tour in Vieques Island
Excellent service from the first. Communicated the instructions immediately and very clear what to do. Loved the guide. Very personable but attentive to needs. Someone in another kayak needed some help and the guide Adel was right there to help. She knew exactly where to take us to maximize what we saw.
star-5
Recommend 100%
Carly_H, Aug 2022
Bioluminescent Bay Kayak Trip from Vieques
Absolutely amazing! Great tour guides! Loved Lulu! Recommend 100%. Thank you for the amazing experience!
star-5
The best day of your life.
Amber_H, Jul 2022
Bioluminescent Bay Kayak Trip from Vieques
My son said “this was the best day of my life“. That about sums it up. Look down in the water and you see this majestic bioluminescent wonder, look up and you see more stars than you ever have. It was truly magnificent. You have to do it. Also this tour was 100% perfect. You can tell the tour operators really care about what they do. Very informative, very nice, everything went on perfectly without a hitch.
star-5
Great experience
Wesley_Z, Jul 2022
Overnight Bio Bay Kayak Tour in Vieques Island
Adele is a such a sweet guide, we all had so much fun that night in the mosquito bay. Unforgettable great experience!
star-5
Amazing experience!!!
Holly_Z, Jul 2022
Bioluminescent Bay Kayak Trip from Vieques
The most amazing experience ever! The guides were very knowledgeable and we had a complete blast! Bioluminescence is a once in a lifetime experience! Just do it!
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Things to Know Before You Go

  • Nighttime tours require a stay overnight on Vieques Island; the tour company can typically provide recommendations for hotels or guest houses.

  • Be sure to apply bug repellent, as Mosquito Bay lives up to its name.

  • Mosquito Bay is the only bioluminescent bay in Puerto Rico where swimming is permitted.

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How to Get There

Mosquito Bay is located on the southern shore of Vieques, which can be reached by ferry from Fajardo on the main island of Puerto Rico. Reaching the bay is an adventure in itself that requires a 10-minute drive down a very bumpy and rutted 4WD track. Tours typically provide transportation to the bay from the town of Esperanza on Vieques Island.

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When to Get There

The dinoflagellates in Bioluminescent Bay are active year-round but are best seen during the new moon, when the sky is darkest and the water glows brighter by comparison. Tours typically do not operate the day before, during, and after the full moon, when the organisms are difficult to see.

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Must-See Vieques Attractions

Isla Vieques was under the control of the US Navy for 60 years and thus remains largely undeveloped. The small island is home to unspoiled rain forest dotted with pristine beaches and archaeological sites including the Hombre de Puerto Ferro, where skeletal remains up to 4,000 years old were discovered. Along with the famous bio bay, Vieques is host to some excellent snorkeling, especially at Blue Beach (Bahía de la Chiva).

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