Reviewed · BIOLUMINESCENT PLANKTON TOURS
Cartagena: Visit 4 islands in a speedboat + plankton!
The real draw here comes after dark: you board a small boat and enter the sea to see luminous plankton glow around you. Before that, the day packs in four island stops, a speedboat ride through the Rosario area, shrimp ceviche, lunch, and sunset at Playa Blanca. I like the big range of scenery and the fact that transport, food, a life jacket, and the plankton trip are covered. The trade-off is a long, tightly timed day with extra charges and Spanish-only guiding.
I also like that pickup is offered from Morros, Castillo Grande, Bocagrande, and Laguito, which saves you a taxi to the dock. You should bring your own water, though. At Cholón, three bottles have reportedly cost 150,000 COP, and some beach chairs and drinks are not included.
Key points to know before you book

- The glowing plankton comes late: The luminous sea bathing takes place after sunset and includes a short explanation, snack, boat ride, and life jacket.
- You cover four main stops in one day: Rosario, Cholón, Playa Tranquila, and Playa Blanca each offer a different kind of visit.
- The Rosario stop is not a beach stop: The boat remains offshore, with snorkeling or aquarium entry offered as optional extras.
- The day starts early and runs long: Pickup begins around 6:50 to 7:50 a.m., and the return is planned for about 8 p.m.
- Extra costs affect the final price: Add the 26,500 COP port tax, and budget separately for drinks, chairs, snorkeling, aquarium entry, and plankton photos.
- Spanish is the tour language: You receive a live Spanish-speaking guide, so this suits you best if you understand basic Spanish or are comfortable with a less detailed explanation.
What a $62 island day really includes

At $62 per person, this is not simply a beach transfer. The price covers a full day of transport, several organized stops, lunch, shrimp ceviche, beach time, a guide, and the special night boat trip for plankton. That makes the package potentially good value if you want to see several places and do not want to arrange each boat ride yourself.
The price is less attractive if you want a quiet day in one place. You spend much of the day moving, waiting, or changing boats. The port tax is another 26,500 COP per person, and optional activities can quickly raise the total. Snorkeling is listed at 40,000 COP in one part of the information and 50,000 COP in another, so confirm the current price before paying. Aquarium entry is listed at 40,000 COP.
You should also budget for drinks and beach chairs. The package includes a beach chair in the main inclusions, but the additional information says chairs are not included for certain parts of the day. That contradiction is worth clearing up with the operator by WhatsApp before departure. The same applies to photos of the plankton, listed at 35,000 COP.
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Early pickup and the trip to La Bodeguita

Pickup takes place by bus from selected parts of Cartagena. The stated windows are 6:50 to 7:10 a.m. in Los Morros, 7:30 to 7:50 a.m. in Bocagrande and Laguito, and around 8:15 a.m. at Muelle de los Pegasos. The tour also identifies La Bodeguita as the departure dock, so check your confirmation carefully for the exact meeting point.
This matters because the dock can be confusing when several boats and tours are leaving. Keep the confirmation message handy and wait in your hotel lobby if you selected hotel pickup. The operator sends the final plan by WhatsApp the day before, which is useful, but you should read it closely rather than assume the pickup point is directly outside your hotel.
The bus ride is listed as about one hour. It gets you to the dock without arranging a separate taxi, but it also means the day begins early. Wear clothes you can sit in for a while, and keep sunscreen, water, and valuables easy to reach.
Speedboat views around the Rosario Islands

From the dock, the boat ride to the Rosario area takes about an hour. The trip itself is part of the appeal. You get a broad view of the island group from the water rather than seeing only one beach resort.
The tour includes a 30-minute guided visit and a panoramic ride around the Rosario Islands. This is a sightseeing introduction, not a long beach stay. The important fine print is that the boat does not stop at a normal swimming beach in Rosario. You are in open water, and you may be offered snorkeling or a visit to the national aquarium.
Snorkeling costs extra, with the supplied details giving both 40,000 and 50,000 COP as possible prices. Aquarium entry is listed at 40,000 COP per person. If you skip both, you may wait on the boat for roughly an hour. That can feel like dead time, especially if you expected a long swim, so decide in advance if either add-on interests you.
I would treat this section as a quick look at the island group, not as the main beach experience. The tour covers ground efficiently, but it does not give you much control over how long you stay at each location.
Cholón, one hour of boats, water, and noise

The next stop is Cholón, where you get about an hour of free time. Cholón is known for a party-on-the-water setting, so this stop is more about the atmosphere and boat access than a calm, empty stretch of sand.
The tour includes shrimp ceviche here, which gives you a small taste of local coastal food. You may also find people approaching to sell drinks or other items. Bring cash only if you are ready for optional purchases, and ask the price before accepting anything. A reported charge of 150,000 COP for three bottles of water is a good reason to carry your own refillable bottle or buy water before leaving Cartagena.
The boat arrangements deserve attention. The day may involve changing boats between Rosario, snorkeling, Cholón, and later stops. That is normal for a multi-stop island excursion, but it can make the day feel crowded and hurried. Keep your belongings in a dry bag or sealed pouch, especially when moving between boats.
Cholón may suit you if you want lively water activity and a social stop. If you want silence, shade, and a slow swim, this is probably the least satisfying part of the day.
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Playa Tranquila for lunch and a proper beach stop

After Cholón, you head to Playa Tranquila. The schedule gives you about an hour at the beach, followed by around 45 minutes for lunch. This is where the tour shifts from offshore sightseeing to a more conventional beach visit.
The included lunch is useful because food on the islands can be expensive, and you do not have to spend your beach time searching for a meal. The itinerary also lists a snack later, before the plankton experience. Exact lunch choices are not supplied, so ask about the menu if you have dietary restrictions.
An hour is enough to sit, take in the water, and cool off, but not enough for a relaxed half-day beach visit. You will need to watch the time. The tour is designed to keep moving toward Playa Blanca and the evening program.
I like this stop more for its practical role than for the length of the visit. It breaks up the boat travel and gives you a place to eat, but you should not expect a leisurely resort afternoon.
Playa Blanca and the sunset finish

The final major beach stop is Playa Blanca on Barú Island. The plan includes about an hour for sunset, followed by a guided visit of roughly 1.5 hours. A beach chair is listed among the inclusions, although other details warn that chairs may cost extra, so confirm this before settling in.
Sunset is a strong reason to stay through the full day. After the fast boat rides and short stops, the changing light gives you a calmer pause before the night program. You can use this time for photographs, a walk, or simply sitting by the water.
Playa Blanca can also be the most appreciated part of the route for people who want a recognizable beach setting. Still, this is not a private beach outing. You may be approached by vendors, and drinks or other purchases are separate. Keep your expectations realistic: the tour gives you a sunset stop, not a secluded beach escape.
The 1.5-hour guided portion may include local orientation and time at the beach, but the supplied information does not name the guide or give a detailed script. The live guide speaks Spanish, so ask questions early in the day if you want help understanding the schedule.
The luminous plankton after dark

The plankton experience is the unusual part of this excursion. Before entering the water, you receive about 20 minutes of explanation. Then you get a snack, board a speedboat, put on a life jacket, and take part in luminous nocturnal sea bathing.
Luminous plankton can create small flashes of light as the water moves around you. The effect is easiest to appreciate in darkness, and the experience depends on natural conditions. It is not a stage show, and the brightness can vary. That uncertainty is part of the appeal, but you should not expect the same display every night.
You should bring a swimsuit, even though the official packing list only calls for comfortable shoes, sunscreen, and comfortable clothing. A dry change of clothes would also make the long return easier, though the supplied information does not specifically require one.
The tour includes the speedboat, life jacket, explanation, snack, and night swim. Photos cost an additional 35,000 COP. If you want a picture, ask how it will be taken and when you will receive it before paying. Keep phones protected from water, because the experience involves getting into the sea at night.
The return to Cartagena is by bus rather than speedboat. The planned day runs from about 8 a.m. to 8 p.m., though pickup begins earlier. After a full day in sun, salt water, and moving boats, you may be ready for a quiet ride home.
Comfort, safety, and the parts that need care

This is an active day with repeated boat transfers, beach access, and nighttime swimming. It is not suitable for pregnant women, babies under one year, or people over 70 according to the stated restrictions.
A life jacket is included for the plankton boat, but you should still follow the crew’s instructions during every transfer. Wear secure footwear for docks and boats, use strong sunscreen, and keep your bag small. Comfortable clothing is more useful than a carefully styled beach outfit.
The tour has a few practical warning signs. One account describes boats feeling crowded, repeated boat changes, pressure to buy drinks, and a return bus that did not stop directly at the hotel. These problems may not happen every day, but they are worth planning around. Confirm where the return bus will leave you, and keep enough phone battery and mobile data to contact the operator if you are separated from the group.
The Spanish-only format is another real consideration. If you speak little Spanish, the guide may not be able to explain each stop in detail in another language. You can still follow the basic route, but this is not the best choice if language support is central to your enjoyment.
Who will get the most from this tour

I would choose this tour if you have one full day in Cartagena and want to combine several island stops with the unusual plankton swim. It suits energetic people who prefer a full schedule and do not mind spending hours on boats and buses.
It also works well for you if planning separate transport feels like a hassle. Hotel-area pickup, round-trip boat transport, lunch, beach time, and the night activity are bundled together.
I would look elsewhere if your main goal is a quiet beach day, a small private boat, or long snorkeling time. The Rosario portion is short, optional activities cost extra, and the route may feel rushed. You also need to be comfortable with Spanish, open-water transfers, and a late finish.
Free cancellation is available up to 24 hours before departure, and you can reserve now and pay later. Those terms give you some flexibility, but they do not remove the need to check the final pickup message and extra charges.
Should you book the four-island plankton tour?
Book it if you want variety more than relaxation. For $62, the combination of Rosario views, Cholón, Playa Tranquila, Playa Blanca, food, sunset, and luminous plankton gives you a lot in one day, even after adding the port tax.
Skip it if you want generous time at one beach or a polished, quiet experience. Bring water, expect possible boat changes, confirm chair and snorkeling prices, and remember that the guide speaks Spanish. With those limits in mind, this is a memorable but demanding day, best for curious visitors who want to see several sides of Cartagena’s island circuit rather than settle into one patch of sand.
FAQ
How long does the tour last?
The full experience lasts about 12 hours. The stated schedule runs from approximately 8 a.m. to 8 p.m., with some hotel pickups beginning as early as 6:50 a.m.
Where can I be picked up?
Pickup is available in Morros, Castillo Grande, Bocagrande, and Laguito. Specific pickup windows are sent by WhatsApp the day before.
Where does the island trip leave from?
The departure is identified as La Bodeguita dock. The schedule also refers to Muelle de los Pegasos at about 8:15 a.m., so check the final confirmation for your exact meeting point.
Which places does the tour visit?
The route includes a panoramic visit around the Rosario Islands, about an hour at Cholón, Playa Tranquila for a visit and lunch, and Playa Blanca on Barú Island for sunset and a guided visit.
Is snorkeling included?
No. Snorkeling is an optional activity with an additional charge. The supplied information lists the price as either 40,000 or 50,000 COP, so confirm the current amount on the day.
Is aquarium entry included?
No. Entry to the national aquarium is optional and is listed at 40,000 COP per person.
What does the plankton activity include?
It includes about 20 minutes of explanation, a snack, a speedboat ride, a life jacket, and luminous nocturnal sea bathing. Photos are available for an additional 35,000 COP.
Is the tour offered in English?
The live tour guide is listed as Spanish-speaking. No English-language guiding is specified.
What extra costs should I expect?
You should expect to pay the 26,500 COP port tax per person. Drinks, some beach chairs, optional snorkeling, aquarium entry, unspecified activities, and plankton photos are not fully included.
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