Tours/Grand Cayman/Bioluminescent Bay Adventure in Grand Cayman
Viator · group up to 35 pax

Bioluminescent Bay Adventure in Grand Cayman

4.3(17)Grand Cayman1 hour
VIATOR4.3(14)TRIPADVISOR4.3(3)

Description

Join us for an unforgettable evening as you witness millions of tiny plankton illuminating the waters at night. This exclusive boat tour features an evening swim in the glowing waters, guided by local experts who unveil the bay's hidden secrets. Our adventure includes two incredible stops: first, visit the iconic Starfish Point, where you'll learn about the intriguing upside-down jellyfish. Then, dive into the wonders of Bio Bay, choosing to marvel from the boat or take an optional swim to experience this natural phenomenon up close. Don't miss this unique adventure—it's a must-do on your Grand Cayman getaway!

Tour Options

Bioluminescent Bay Adventure in Grand Cayman
  • Pickup included

Itinerary

Admission included90 min

Enjoy a scenic 40-minute drive from your accommodation to the stunning East End. Your first stop is the breathtaking Starfish Point, the ultimate sunset attraction in the Cayman Islands. Here, you'll receive an insightful briefing about the unique upside-down jellyfish before heading to the famous Bio Bay. Dive in and swim (optional) as you marvel at the enchanting bioluminescence.

90 min

Experience the enchanting bioluminescent bay at Cayman Kai, where nature glows under the night sky. Join our local experts for an unforgettable adventure as each splash ignites millions of shimmering plankton, creating a breathtaking, starry sea around you. This tour is a must-do during your Cayman Islands getaway! Don’t miss the chance to capture stunning photos in these pristine waters!

Highlights

Water and fruit punch
Certified captain and crew
Snorkel set: Fins, snorkel and mask
Roundtrip Transportation from Seven Mile Beach hotels
Life vest
Entrance fee to the Marine Park of Cayman Islands
Air-conditioned vehicle

What's included

Included
Water and fruit punch
Certified captain and crew
Snorkel set: Fins, snorkel and mask
Roundtrip Transportation from Seven Mile Beach hotels
Life vest
Entrance fee to the Marine Park of Cayman Islands
Air-conditioned vehicle
Not included
Snacks
Gratuities
Transportation outside the Seven Mile Beach area

Pickup Locations & Times

We offer shuttle services to and from resorts, condos, and AirBnBs in the Seven Mile Beach area. The exact pick-up time will be sent after your booking is confirmed. To ensure a smooth pick-up, guests should provide the full name of their accommodation. Please be ready at least 10 minutes before the scheduled pick-up time.

Traveller Ratings

4.3
17 reviews
5
11
4
2
3
2
2
2
1
0

Important Information

  • Wheelchair accessible
  • Infants and small children can ride in a pram or stroller
  • Infants are required to sit on an adult’s lap
  • Not recommended for travelers with spinal injuries
  • Suitable for all physical fitness levels
  • Flotation devices for children under age 3 are not available
  • Travelers must bring their own towel
  • Tour start times may vary seasonally to ensure you have the best experience possible.
  • The total tour time includes travel, with the Bioluminescence Tour lasting 2 hours from dock to dock.
  • Images are for illustration only; your actual experience may vary, highlighting the enchanting unpredictability of bioluminescence.
  • Tours are scheduled around moon phases, so availability may change.

Reviews(17)

D
David_F
June 21, 2026
Amazing Experience

The crew was fantastic. Very friendly and professional. They spent lots of time navigating the bay to find the best place to experience the phenomenon. Book closer to a new moon if possible. Highly recommend. Once in a lifetime experience.

T
Tanya_R
June 11, 2026
Very cool experience

The crew was professional, friendly, funny, and informative. Very cool experience! Our first stop was Starfish Point, unfortunately the mosquitos were inside. This is out of anyone’s control and it didn’t dampen the experience. Bio Bay was such a cool experience.

P
paszievelvet
June 7, 2026
What an incredible...

What an incredible experience! I highly recommend this bioluminescent tour. Our guides were fantastic—friendly, knowledgeable, and incredibly helpful throughout the entire trip. They provided fascinating information about the bioluminescence and made the experience both enjoyable and memorable.

M
Michael_C
April 24, 2026
Great experience! Captain...

Great experience! Captain was very informative and catered to our requests to pick us up at another port

H
Hristiyana_R
April 23, 2026
Must do at least once in a lifetime

We had a nice time. Witnessing the water glow was such a unique experience. Our crew on Miss Anna was great too. The Captain was very informative and shared cool details about the island. Thank you for the wonderful evening.

S
sspringer39
April 11, 2026
What a magical night!

The convenient shuttle arrived on time at our condo and took us to Captain Marvin’s beautiful, like-new boat where we were warmly greeted by our first-class and fun crew - Michael, Jessie and Romel..They took us first to Starfish Point to view and hold the many starfish there. Along the way, Romel took some great pics of us enjoying the sunset ride. Then we were off to Bioluminescent Bay to experience the glow! Romel captured multiple videos of each of us, and also our group, surrounded by the glittering plankton. On our way back to port, he skillfully edited the pics & videos for us to view and offered a no-pressure option to purchase them (which we eagerly did - the price was very reasonable). The images were emailed to us before bedtime. I HIGHLY RECOMMEND this experience to anyone young or old!

K
Kathleen_S
March 20, 2026
Beautiful evening

The captain and crew were amazing! Their technical expertise coupled with their sense of humor were awesome! The ship was very nice! It was great fun to be out on the water after dark!

6
655jeanniea
February 10, 2026
Great crew; meh on the glowing

The captain and the crew were exceptionally knowledgeable and kind, and the boat was lovely and comfortable. However, the bioluminescence looks nothing like that promotional photo and it feels slightly deceptive to advertise it that way. The glowing in the dark is much more subtle and barely noticeable from above. On our night, the air and water were very cold and not inviting, and the "wetsuits" do not provide warmth, but rather only protection from jellyfish. The stars were spectacular, but the bioluminescence was underwhelming.

W
William_L
August 28, 2025
Cool experience

I was questioning if this would be worth the money, but it was 100% worth it. The Bio bay is a very cool experience that everyone needs to do. Make sure to use the snorkeling gear provided as it adds a whole other level to it.

Operator response

Hi William, We’re thrilled to hear you had such an amazing time at the Bioluminescent Bay Adventure in Grand Cayman! We’re glad you decided it was 100% worth it—the bio bay truly is a magical experience, and using the snorkeling gear definitely takes it to the next level! Thank you for choosing us during your stay at the Kimpton Hotel to spend your day in the beautiful Caribbean. We’d love to see your favorite moments, so feel free to share your stories and tag us on Instagram or Facebook at @NextExperienceTravel—your adventure might inspire other travelers too! We can’t wait to welcome you back for another unforgettable experience! Warm regards, The Cruise Shore Expeditions Team 🌴

N
Natalie_W
June 30, 2025
The crew and the boat...

The crew and the boat were fantastic. The cost for the experience was overpriced . For what little time that we had .The email that we received was for one spot to meet at and it was wrong . So not very good communication as well . All of the people on board said the same thing about how they didn’t know were to go .. Other that that the guys that were the crew members they were awesome.

Operator response

Hi Natalie, Thank you for choosing us during your vacation in the beautiful Grand Cayman in the heart of the Caribbean. We’re glad to hear you enjoyed the experience with our amazing crew—they truly love what they do! We’re sorry to hear there was some confusion with the meeting point and that the experience didn’t fully meet your expectations. Your feedback is really helpful, and we’re working on improving communication to make it easier for future guests. We hope to welcome you back for a smoother and even more memorable adventure! Warm regards, The Cruise Shore Excursions Team

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