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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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Bioluminescent Bay Kayak Trip from Vieques
Likely to Sell OutLikely to Sell Out
Bioluminescent Bay Kayak Trip from Vieques
star-4.5
$60.00 per adult
Traveler Favorite
Mesmerizing waters
The tour guides, Lulu and Christopher, were both wonderful and so accommodating! I cannot recommend this tour enough!
Mallory_M, Feb 2023

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-5
Bio bay tour
Walberto_R, Feb 2023
Bioluminescent Bay Kayak Trip from Vieques
It was awesome to see how the company supports the ecosystem by using kayaks and no lights while in the water. Rocket and John are very knowledgeable about the Bio Bay and the stars in the sky. It’s difficult to see the stars at night from the metropolitan areas and was very nice to be able to appreciate their beauty.
star-4
Good but not the best
Chris_S, Feb 2023
Overnight Bio Bay Kayak Tour in Vieques Island
Overall a nice experience. We chose this tour over the slightly more expensive option also available on Viator. This tour does NOT have clear kayaks, but I don't think that diminished our enjoyment. We had a nice time, the guide was knowledgeable and fun.
star-5
The waters shine bright like a diamond
Miguel_P, Jan 2023
Overnight Bio Bay Kayak Tour in Vieques Island
The Bioluminescent tour was such a beautiful place to explore. Definitely experience it at night; the darker the better. You don't have to worry about any mosquitos being around, even though it's called Mosquito Bay... Yes, I know, the irony. Check out Sun Bay Beach too while in Vieques. It's a little hidden, but just keep driving towards the beach.
star-5
out-of-this-world experience
Maryam_A, Feb 2023
Bioluminescent Bay Kayak Trip from Vieques
This was the highlight of our Puerto Rico trip. A magnificent experience. This is apparently the best of only a handful of bio bays around the world.
star-5
A must do
Cheri_H, Jan 2023
Overnight Bio Bay Kayak Tour in Vieques Island
Incredible experience. Like kayaking through diamonds. Went on a moonless night and it was perfect..
star-5
Paddle with the stars and the dinoflagellates!
jennife_m, Jan 2023
Bioluminescent Bay Kayak Trip from Vieques
I loved Lulu’s enthusiasm for the bio bay and the constellations. She is upbeat, relaxed, and funny. I do some work with a water sports outfit at home and I think that Lulu’s guiding is on a par with the best.
star-5
Best Night of our Vacation!
Derek_A, Jan 2023
Bioluminescent Bay Kayak Trip from Vieques
Had a great time experiencing the magical waters of Mosquito Bay. The tour guides were very knowledgeable about the area and had plenty of great stories to share. They also were able to point out multiple constellations in the sky. It was a clear night and I have never seen so many stars! Finally when the tour was over the guides invited everyone to have a drink at Lazy Jacks Restaurant. We decided to join them and it was a blast!
star-5
Great experience. Would...
Nicole_B, Jan 2023
Overnight Bio Bay Kayak Tour in Vieques Island
Great experience. Would definitelt recommend. Easy to participate and we had a friendly informative guide
star-5
Fun and educational
John_W, Jan 2023
Bioluminescent Bay Kayak Trip from Vieques
Rocket and Lulu did a great job. Made everyone feel welcome. Well-organized and perfect execution. Rocket is a fountain of knowledge about the history and science of the bay and Lulu the same about the stars and constellations. If you’re wanting this experience…definitely go with them.
star-5
Beautiful experience
Rosemary_G, Jan 2023
Overnight Bio Bay Kayak Tour in Vieques Island
Adele was such a great tour guide. Very kind, patient and humorous. My favorita part is the fact that not only is the a beautiful natural excursion but it was educational.
star-5
Amazing time!
Rebecca_S, Jan 2023
Bioluminescent Bay Kayak Trip from Vieques
We had an amazing experience! So many fish! The sky was super clear so we got a star tour too. It was better than we could have hoped for. Rocket and Yan were great guides.
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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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