Cocos Island

Cocos Island is located in the Pacific Ocean about 300 miles off the west coast of Costa Rica. It posses one of the most a unique endemism and biodiversity in the world that it has been be declared a World Heritage Site.

The land area of Cocos Island is 23.85 km, 7.6km. wide and 4.4Km. long. The marine protected area is 12 nautical miles around, and patrolled by guards known as Mar Viva, an organization that helps maintain and protect the fish outside of the Marine Park. They assist in preserving the huge variety of sharks sighted on the island, including: Hammerheads, Silky Sharks, White Tips, Silver Tips, Galapago Sharks and even whales are just some examples.



Cocos Island is famous for among other things, as already mentioned, for its rich biodiversity. Diving on the island gifts divers with continual surprises where all kinds of encounters are possible! This can include: whale sharks, whales, dolphins, mantas, rays, hundreds of white tip sharks , humpback whales, turtles and of course hammers. The latter come in large schools thanks to the cleaning stations that are in the area.

The Divemaster will always provide a briefing explaining the conditions of each dive dive, but in general, gloves and long neoprene wetsuit is always recommended. All dives on the island, except the dive check is performed from zodiacs, are adrift with the exception of night dives.

These night dives on the island, are undoubtedly one of the great attractions of this trip. To find yourself surrounded by hundreds of white tip sharks is definitely a unique experience.
Diving in Cocos Island is unique, in addition to the sightings, because they are only allowed 12 divers per dive, a luxury!

The minimum temperature on the island is 22 ° C, but due to the thermocline it is recommended to bring a 5mm suit with hood and gloves. Although the water in summer may be around 30 ° C, it is still recommended to wear gloves and wetsuit due to the currents. Divers may often have to hold onto rocks and volcanic material.


Diving on the Cocos Island requires an advanced level of expertise, with experience in night diving, drift diving and diving from a zodiac.The conditions of the currents and the depth of dives also make diving at Cocos Island and advanced location. It is not a recommended for beginner destination.

The minimum temperature on the island is 22 º C, so it is recommendable 5mm suit with hood and gloves. Although the water in summer may be around 30 ° C, it is recommended to wear gloves and wetsuit for with the currents,divers may often have to hold on to the rocks and volcanic matter. For this temperature, it would be advisable a suit 3 mm.

Many of the dives performed in the island are deep, between 25 and 30 meters, It is highly recommended that all divers dive with Nitrox.If you are not Nitrox diver, Okeanos Aggressor will provide on board during the voyage. SSI or SDI are the two choices of Nitrox offered on board.

Diving with Nitrox is not mandatory, but highly recommended.

Cocos Isand is a destination NOT recommended for beginner divers.


Nitrox is air that has been enriched by taking away some of the nitrogen using a membrane system to release the excess gas or using a blending system to add more oxygen than the 21% which is found in air.


By breathing an EAN, Enriched Air Nitrox mixture, you will absorb less nitrogen, leaving you longer bottom time on your dive, shorter off gassing time and it is also probably that you will be less sleepy and have less post dive fatigue.

However Nitrox has also its inconveniences.

Please talk to our Instructors and find out more about the course. While Nitrox is recommended for the depths we dive in Cocos, you can also choose to dive air.


It’s easy! Just talk to our instructor, and he will schedule the course during the initial sailing, so you can be diving Nitrox as soon as you arrive to Cocos. Both TDI and SSI Nitrox courses can be taught onboard.

The fee for the course is $150, and $80 for Nitrox fills for the whole charter and $35 for the certification card that the agency will be sending to your home.

ENRICHED AIR FILL RATES (For Already Certified Nitrox Divers)

10 days charter Unlimited fills $150 / per tank $10

If you travel with Dancer Fleet this year, you are eligible for FREE NITROX fills on the next Dancer Fleet liveaboard trip you take during the next consecutive year.So, that means, theoretically, you could get FREE NITROX with us indefinitely as long as you travel on a Dancer Fleet Vessel every consecutive calendar year.


1. Every diver is responsable for his/ her own dive profile. Crewmembers are there to show you around but they are not supervisors. Buddy system in Cocos is a must!
2. All diving will be conducted within recreational diving limits. No dives are to be planned or executed at a depth greater than 120 feet.
3. If a diver choses to go deeper than 120 ft, no crew member will endanger himsef to rescue the diver.
4. Divers are expected to stay within the limits of their own training and certifications and asked to keep a dive log in order for the crew to have accurate information in the event of an emergency.
5. If you are taking a medication, that can affect you while diving, please talk to our Divemaster.


At Cocos Island, there is no one season better than another, but rather, depends on the water temperature and thermoclines.

The water temperature ranges from 29 degrees in the months of January, February, March and April, holding a minimum of about 22 degrees in the months of July, August, September and October.What makes exceptionally stable good snorkeling on the island is these thermoclines that maintain permanent schools of hammerheads throughout the year.

Dive the World Club: 25%

8 December- 18 December


Diving Environment

  • whale sharks, whales, dolphins, mantas, rays, hundreds of white tip sharks , humpback whales, turtles and of course hammers.
  • Water temperature: 72 - 82F with cooler thermoclines
  • 3 - 5 mm wetsuit recommended

Cocos Island Top Dive Map

Cocos Island Dive Map Costa Rica