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
Suggest edits to improve what we show.
Improve this listing
Tours & experiences
Explore different ways to experience this place.
What is Travellers’ Choice?
Tripadvisor gives a Travellers’ Choice award to accommodations, attractions and restaurants that consistently earn great reviews from travellers and are ranked within the top 10% of properties on Tripadvisor.

Top ways to experience Bioluminescent Bay and nearby attractions

See what travellers are saying
  • Carmen H
    6 contributions
    5.0 of 5 bubbles
    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 8 July 2023
  • Fiona
    7 contributions
    5.0 of 5 bubbles
    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
    Travelled as a couple
    Written 16 December 2023
  • Brian M
    1 contribution
    5.0 of 5 bubbles
    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
    Travelled with family
    Written 16 January 2024
  • Cheri Davis
    Colorado337 contributions
    5.0 of 5 bubbles
    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
    Travelled as a couple
    Written 18 February 2024
  • OnAir157712
    31 contributions
    5.0 of 5 bubbles
    Loved it
    Captain Marvin’s tour guides Denroy & Michael were very knowledgeable and polite. Tour guide Michael took my 4 year old and I personally in the water and helped us with snorkeling and making sure we get an excellent experience with bioluminescence. Very happy we booked with this company.
    Visited February 2024
    Travelled with family
    Written 26 February 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 waiting time, length of visit, general tips, and location information.

Popular mentions

4.5
4.5 of 5 bubbles248 reviews
Excellent
195
Very good
31
Average
12
Poor
6
Terrible
4

Chris D
1 contribution
4.0 of 5 bubbles
May 2024 • Family
George and Michael were great hosts. Knew their way around the boat, made the experience fun and were safe at all times. Add this tour to your list!
Written 24 May 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.

TravelGirl22
George Town, Grand Cayman2 contributions
1.0 of 5 bubbles
Apr 2024 • Family
Not much of a bio bay. You also will be swimming in a special wetsuit so you don’t get stung by hundreds of jellyfish. Several people got stung on the trip. You couldn’t see anything and they told you to swim under the boat to see it.
Written 27 April 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.

Rose S
4 contributions
3.0 of 5 bubbles
Apr 2024 • Couples
Don't expect to see much if you stay on the boat. You have to snorkel if you want to see the lights. I wear glasses so could not snorkel. Not too exciting for me.
Written 8 April 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.

OnAir157712
31 contributions
5.0 of 5 bubbles
Feb 2024 • Family
Captain Marvin’s tour guides Denroy & Michael were very knowledgeable and polite. Tour guide Michael took my 4 year old and I personally in the water and helped us with snorkeling and making sure we get an excellent experience with bioluminescence.
Very happy we booked with this company.
Written 26 February 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.

Adrienne F
4 contributions
5.0 of 5 bubbles
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 19 February 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
Colorado337 contributions
5.0 of 5 bubbles
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 18 February 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
5 contributions
5.0 of 5 bubbles
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 4 February 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 Heights33 contributions
5.0 of 5 bubbles
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 4 February 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, MO7 contributions
5.0 of 5 bubbles
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 2 February 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
5.0 of 5 bubbles
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 20 January 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.

Showing results 1-10 of 246
Is this your Tripadvisor listing?
Own or manage this property? Claim your listing for free to respond to reviews, update your profile and much more.
Claim your listing

Bioluminescent Bay - All You Need to Know BEFORE You Go (2024) - Tripadvisor

All Grand Cayman HotelsGrand Cayman Hotel DealsLast Minute Hotels in Grand Cayman
All things to do in Grand Cayman
Amusement Parks in Grand Cayman
RestaurantsFlightsHoliday homesTravel StoriesCruisesCar Hire