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Bio Bay Tour: Swim in Glowing Waters
4.0
12 Ratings
Grand Cayman
Discover Grand Cayman’s glowing waters on a bioluminescent bay tour. Swim with plankton, explore Starfish Point, and uncover hidden secrets with local experts.
Discover Grand Cayman’s glowing waters on a bioluminescent bay tour. Swim with plankton, explore Starfish Point, and uncover hidden secrets with local experts.
Duration:
3 hours
Cancellation:
24 hours
Highlights
- Starfish Point - Take a picturesque 40-minute drive from your lodging to the beautiful East End. Your first destination is the awe-inspiring Starfish Point, the premier sunset spot in the Cayman Islands. Here, you’ll receive an informative briefing about the distinctive upside-down jellyfish before proceeding to the renowned Bio Bay. Dive in and…
- Starfish Point - Take a picturesque 40-minute drive from your lodging to the beautiful East End. Your first destination is the awe-inspiring Starfish Point, the premier sunset spot in the Cayman Islands. Here, you’ll receive an informative briefing about the distinctive upside-down jellyfish before proceeding to the renowned Bio Bay. Dive in and swim (optional) as you admire the captivating bioluminescence.
- Bioluminescent Bay - Discover the magical bioluminescent bay at Cayman Kai, where nature illuminates the night sky. Join our local experts for an unforgettable journey as each splash lights up millions of sparkling plankton, creating a stunning, starry sea around you.
This tour is a must-experience during your Cayman Islands vacation! Don’t miss the opportunity to capture breathtaking photos in these pristine waters!
What's Included
- Certified captain and crew
- Roundtrip Transportation from Seven Mile Beach hotels
- Entrance fee to the Marine Park of Cayman Islands
- Snorkel set: Fins, snorkel and mask
- Life vest
- Water and fruit punch
- In-vehicle air conditioning
- Certified captain and crew
- Roundtrip Transportation from Seven Mile Beach hotels
- Entrance fee to the Marine Park of Cayman Islands
- Snorkel set: Fins, snorkel and mask
- Life vest
- Water and fruit punch
- In-vehicle air conditioning
What's Not Included
- Snacks
- Gratuities
- Transportation outside the Seven Mile Beach area
- Snacks
- Gratuities
- Transportation outside the Seven Mile Beach area
Additional Information
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…
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!
- 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.
Location
Kaibo restaurants, beaches, marina
Water Cay Road
Your adventure begins at Kaibo Restaurant Pier, located at 585 Water Cay Rd. Please arrive 30 minutes early. Look for our driver in a logoed polo shirt, who will call your name upon arrival. Note that the driver can only wait for 5 minutes.
Cancellation Policy
For a full refund, cancel at least 24 hours before the scheduled departure time.
For a full refund, cancel at least 24 hours before the scheduled departure time.
Customer Ratings
4.0
(12 Ratings)
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Sspringer39
Apr 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!
Review provided by Tripadvisor
Kathleen_s
Mar 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!
Review provided by Viator
William_l
Aug 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.
Review provided by Viator
505parkerj
Apr 21, 2025
Unforgettable Experience! - Amazing experience! The crew was friendly and knowledgeable and the experience was unforgettable. Swimming in the bioluminescent water was one of my all time favorite experiences that I will never forget. 10/10
Review provided by Tripadvisor
Jerald_c
Feb 3, 2025
Nighttime experience in Grand Cayman - Great experience and crew that we very educated about the experience. Great nighttime activities too
Review provided by Viator
William_b
Jan 25, 2025
Great tour but could be a little better - The only way you see the bioluminescence and the plankton is by swimming with them. If you don’t want to get in the water this tour is not for you. I had a fun time and enjoyed myself.
Review provided by Viator
Donna_c
Jan 18, 2025
Great boat trip but not much bioluminescence - We went on this tour in January 2025. The staff on the boat were fun, friendly and informative! The boat was nice, clean, and comfortable!
We saw very little bioluminescence and it wasn’t like it was shown in the listing. Perhaps the jelly fish were not in that location when we went.
Review provided by Viator
655jeanniea
Feb 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.
Review provided by Tripadvisor
Natalie_w
Jun 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.
Review provided by Viator
Gw_r
Jan 25, 2025
Expensive “boat ride” & HUGE disappointment! - We were HIGHLY disappointed after paying $270 for a “boat ride.” We thought we were going to cruise to see colored bioluminescence. We couldn’t even photograph the saltwater-colored plankton. After more than 2 hrs on the boat, the demonstration lasted about 20 mins with someone splashing around in the water. The crew was super and the skipper was shocked when I showed him the website photo of what we THOUGHT we were going to see. BIG disappointment! He said he spoke with his supervisor (apparently by phone) and to expect a phone call, today. NO ONE ever called. DON’T was your money!
Review provided by Viator
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