Bioluminescent Bay
Bioluminescent Bay
4.5
9:00 AM - 6:00 PM
Monday
9:00 AM - 6:00 PM
Tuesday
9:00 AM - 6:00 PM
Wednesday
9:00 AM - 6:00 PM
Thursday
9:00 AM - 6:00 PM
Friday
9:00 AM - 6:00 PM
Saturday
9:00 AM - 6:00 PM
Sunday
9:00 AM - 6:00 PM
About
Marvel at Grand Cayman’s Bioluminescent Bay, a stunning phenomenon that comes alive at night. Here, you can take a boat ride to the bay, and see the ocean light up at one of the area’s best-kept secrets. The bioluminescence is best seen whilst snorkeling or swimming; you can also kayak to see it from above. During the summer months, the bay is usually home to small jellyfish—however, certain tour operators will provide full-body wetsuits, dive gloves and dive shoes to protect swimmers. Choose a half-day tour that includes Starfish Beach, or be guided on a night snorkeling tour. – Tripadvisor
Duration: 2-3 hours
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What is Travelers’ Choice?
Tripadvisor gives a Travelers’ Choice award to accommodations, attractions and restaurants that consistently earn great reviews from travelers and are ranked within the top 10% of properties on Tripadvisor.

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See what travelers are saying
  • Nik
    Summerville, South Carolina9 contributions
    amazing
    This was one of the highlights of our stay. We rented a villa on the bay and were able to kayak into the bay every night. The phytoplankton are simply gorgeous and light up with every touch. Try to go when there isn't much moonlight for the full effect.
    Visited February 2023
    Written February 26, 2023
  • Phil M
    Kettering, United Kingdom11 contributions
    Great night trip with local nature
    Great evening trip with Capt. Marvin's tours. We got to hold jellyfish and starfish. The guides Delroy and Alex were very knowledgeable and made the whole trip fun and interesting. Make sure you take your swimming costumes and towels for the highlight swimming at night with the phytoplankton. Recommended 👍
    Visited March 2023
    Traveled with friends
    Written April 15, 2023
  • Carmen H
    6 contributions
    A must see!
    This was my favorite part of my vacation. Our guides at the Sweet Spot were awesome. They were knowledgeable, patient and sweet. They took their time to make sure everyone's questions were answered and that everyone got the full experience. My family and I learned a lot about the sea creature we encountered. I would highly recommend this tour. P.S. gazing up at the stars was AMAZING!!!
    Visited July 2023
    Written July 8, 2023
  • Fiona
    7 contributions
    Bioluminescence AND jellyfish!
    This tour was fairly short, and very interesting! We went with Cayman Kayaks (on their boat, not a kayak, although you can do that too). We learned all about the bay and the glowing critters, got to play in the water which stirs up all the bioluminescence, and also got a close up (in a bucket) of a Cassiopia jellyfish.
    Visited December 2023
    Traveled as a couple
    Written December 16, 2023
  • Brian M
    1 contribution
    Captain Marvin’s Bio Bay tour
    We chose Captain Marvin’s to give us our tour. Captain Sugarbear and Michael led the tour. They were very informative. They provide all the snorkel gear for you if you want to get into the water. You don’t have to get in but I would recommend it. The stop was a perfect length for snorkeling at the site. The experience was awesome! I’ve never seen anything like it. I would highly recommend this tour and Captain Marvin’s to anyone visiting Grand Cayman!
    Visited January 2024
    Traveled with family
    Written January 16, 2024
  • Cheri Davis
    Colorado176 contributions
    WOW!!! WOOOOW!!
    I have to say this was one of the best excursions and experiences of natural wonders we have ever been on!!! Wow!! Wooooow! I really cannot express this wonderful experience! We stayed at Morritts Resort, rented a car( worth it!!) And we drove to this kayak excusion. There is a bathroom here, bring reusable water bottles, non to purchase, not store. This is at night, bring change of clothes, towels, water shoes, wet/dry clothing. The bioluminescents in this bay are massive and will sparkel in your hands!!!
    Visited December 2023
    Traveled as a couple
    Written February 18, 2024
These reviews are the subjective opinion of Tripadvisor members and not of TripAdvisor LLC. Tripadvisor performs checks on reviews.

Most Recent: Reviews ordered by most recent publish date in descending order.

Detailed Reviews: Reviews ordered by recency and descriptiveness of user-identified themes such as wait time, length of visit, general tips, and location information.

Popular mentions

4.5
244 reviews
Excellent
194
Very good
30
Average
11
Poor
6
Terrible
3

Adrienne F
4 contributions
Feb 2024 • Couples
Such a good time. A bonus was the discussion of the star constellations but the highlight was the bay and the organisms in the water. Very knowledgeable staff and the tour was amazing.
Written February 19, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Cheri Davis
Colorado176 contributions
Dec 2023 • Couples
I have to say this was one of the best excursions and experiences of natural wonders we have ever been on!!! Wow!! Wooooow! I really cannot express this wonderful experience! We stayed at Morritts Resort, rented a car( worth it!!) And we drove to this kayak excusion. There is a bathroom here, bring reusable water bottles, non to purchase, not store. This is at night, bring change of clothes, towels, water shoes, wet/dry clothing. The bioluminescents in this bay are massive and will sparkel in your hands!!!
Written February 18, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Julie R
2 contributions
Feb 2024 • Friends
Had a great time. A must do trip with Sweet spot and captain Marvin. Mike and Delroy were great. They were fun and knowledgeable. We learned a lot from them and they really made the trip fun. Amazing site to see
Written February 4, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

SMaW
Vadnais Heights28 contributions
Feb 2024 • Friends
Great experience!! Knowledgeable staff made it a fun night! So cool to see the water light up at night! We went with friends and we all loved it!
Written February 4, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Amy W
Saint Louis, MO3 contributions
Jan 2024 • Family
We opted to see the bio bay via Cayman Kayaks and were thrilled with their service and the special boat they use that allows for easy interaction with the water. We had such a great time. Would definitely go again!
Written February 2, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Quest680891
2 contributions
Jan 2024 • Family
Was the best experience of my life! The boat ride, stopped to star fish and upside down jelly fish. JUST THE BEST!
Written January 20, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Brian M
1 contribution
Jan 2024 • Family
We chose Captain Marvin’s to give us our tour. Captain Sugarbear and Michael led the tour. They were very informative. They provide all the snorkel gear for you if you want to get into the water. You don’t have to get in but I would recommend it. The stop was a perfect length for snorkeling at the site. The experience was awesome! I’ve never seen anything like it. I would highly recommend this tour and Captain Marvin’s to anyone visiting Grand Cayman!
Written January 16, 2024
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Fiona
7 contributions
Dec 2023 • Couples
This tour was fairly short, and very interesting! We went with Cayman Kayaks (on their boat, not a kayak, although you can do that too). We learned all about the bay and the glowing critters, got to play in the water which stirs up all the bioluminescence, and also got a close up (in a bucket) of a Cassiopia jellyfish.
Written December 16, 2023
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Chris T
Attleboro, MA13 contributions
Oct 2023 • Couples
Had a great tour with Captain Dale, had free beer and water, He let us swim and take pictures as long as we wanted. He was very informative of the area too.
Written October 12, 2023
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

Nicole M
2 contributions
Aug 2023 • Family
Went on the tour with Captain Marvin
Crew: Michael, Captain Segar and Jamariah
Great experience, cre was knowledgeable, professional, helpful and fun!
Recommend this experience when visiting Cayman
Written August 16, 2023
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.

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BIOLUMINESCENT BAY: All You Need to Know BEFORE You Go (with Photos)

Frequently Asked Questions about Bioluminescent Bay

According to Tripadvisor travelers, these are the best ways to experience Bioluminescent Bay: