Okeanos Aggressor, Costa Rica


The M/V Okeanos Aggressor is a 33m world class liveaboard yacht offering year round diving cruises to the remote Cocos Island. The waters surrounding Cocos Island are a playground for hammerheads, eagle rays, and whales. Because of its remote location, Cocos Island’s unadulterated marine beauty has been rated one of the top 10 best places to scuba dive in the world. Scuba diving with the Okeanos Aggressor offers up to four action packed dives each day along with spectacular night dives. Diving amenities include a large swim platform with personal gear lockers, air/nitrox fill stations, rinse tanks, three-tier camera table with low-pressure air hoses and 2 warm freshwater showers.

Topside, an attentive crew of eight is on hand to ensure the comfort and satisfaction of up to 22 guests. MV Okeanos Aggressor has ten lavish staterooms equipped with private bathroom and shower, closet, port window, individual climate control and TV/DVD. Guests can also enjoy the large partially covered sun deck with chaise lounges and deck chairs, bar service and CD/stereo player. The onboard menu features a variety of American fare and local cuisine. Soft drinks, iced tea, beer, and wine are complimentary.

Book online or speak with one of our agents to reserve your Okeanos Aggressor Cocos Island liveaboard diving holiday.

Choose your departure date


Included: VAT, Hotel Transfer, Alcoholic Beverages, Drinking Water, Soft drinks, Tea & Coffee, Wine with Dinner, Full-Board Meal Plan (All meals), Snacks, Diving Package, Cabin Towels, Complimentary Toiletries, Deck Towels.

Required Extras: Dive Insurance, Chamber Fees (30 USD per trip), National Park Fees (350-490 USD per trip), Port Fees.

Optional Extras: Travel Insurance, Gratuities, Airport Transfer, Extra Dives, Nitrox, Nitrox Course, Rental Gear, Scuba Diving Courses, Snorkel Gear.

Book now, pay later: You can easily place your booking online. We will then hold the spaces for you and you can confirm with a payment later.

* Extra fees are shown per person.

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Boat features

  • Camera Station
  • Audio & video entertainment
  • TV in cabins
  • Air Conditioned saloon
  • Aircon Cabins
  • Sun Deck
  • Indoor Saloon
  • Non-Diver (Snorkeler) Friendly
  • Warm Water Showers
  • Camera room with table and charging point
  • Custom built for diving
  • Charging stations
  • En-Suite bathrooms
  • Paid Internet
  • Non-Smoking Rooms
  • Outside Showers
  • Snorkeling Equipment
  • Separate Rinse for u/w Camera
  • Leisure Deck
  • Bar
  • BBQ Area
  • Available for Charter
  • Jacuzzi / Hot Tub

Food & Drinks

  • Western Food
  • Local Food
  • Buffet style
  • Beer available
  • Free Wine w/Dinner
  • Free Soft Drinks
  • Fine Cuisine
  • Full-board Option

If you have any specific dietary requirements whilst on-board your cruise, you can add this to your special requests on step 2 of the booking form. We advise limiting these requests to religious beliefs or food allergies.


  • Nitrox available
  • Rinse Hoses
  • Dive deck
  • Tenders for diving
  • Shaded Diving Area

The crew speaks English.

Gear Rental

There is diving gear available on this boat. Please provide your rental needs on the booking form. See below for further details on inclusions and pricing. Show prices.

Drawings & Vessel Layouts

#deckplan floorplan

Boat Specifications

  • Length 110 feet
  • Beam 24 feet
  • Cruising speed 10 knots
  • Max guests 22
  • Number of cabins 10
  • Number of bathrooms 12

Boat Navigation and Safety

  • Radar
  • Depth Sounder
  • GPS
  • Radio VHF/DSC/SSB
  • E.P.I.R.B. Distress System
  • Emergency Rafts
  • Life Vests
  • Fire Alarm & Fire Extinguishers
  • Oxygen
  • First Aid Kits
  • Satellite & mobile phones
  • Bilge pump alarm
  • Search light
  • Crew trained in first aid
  • Emergency flares

Okeanos Aggressor Reviews

  • 8.8 Fabulous
  • 39 Verified Reviews
  1. Vessel
  2. Crew
  3. Food
  4. Diving
  5. Value
  • 9.6 Exceptional
  • james S
  • Canada Canada
Top notch crew and superb shark diving

Tiger sharks. Lots. Big ones. A hammerhead shark tornado. Jackpot.

Recommended for
Tiger sharks. Hammerheads. The food.
  • 10 Exceptional
  • Joshua M
  • United States United States

Tigers hunting, hammers swarming, Galapagos swaying by, silkys darting, white tips everywhere, black and silver tips appeared a few times, too! All the Marine life at Coco's makes it amazing, unforgettable and like none other! The island is the most beautiful in the world.-JC And it's true!!

Recommended for
Diving, Crew
  • 8.4 Very good
  • Heiko M
  • Germany Germany
Cocos Island, wild & Natur pur

Die Fahrt, das Meer, die Korallen & neben allerlei Haien auch der eine Manta und die eine Schildkröte. Wasserfalltour mit Neopren. In dieser Umfrage fehlt ein Verbesserungs- bzw. Kritikfeld: Der von mir im Vorfeld erfragte Handyempfang auf Cocos ist nur in einer Bucht möglich (immerhin). Über Roaming ging dort das Heimnetz. Lokale Simkarten (Klaro, Movimento z.B.) sind ausgeschlossen, nur Kölbi (ICE) funktioniert. Diese Info hätte ich gerne im Vorfeld gewusst & entsprechend die richtige lokale Simkarte besorgt. Das Erlebnis getrübt wurde dadurch allerdings nicht.

Recommended for
Hammerhai-Tornado bei Dirty Rock / Inselbesuche trotz im Vorfeld kommunizierter Unmöglichkeit / Das Finden einer der letzten Schildkröten bevor die Tiger alle weg gemacht haben.
  • 8.0 Very good
  • Aurélie L
  • France France
Amazing experience

Okeanos Agressor I is a nice and confortable boat. Coco Island is like in the movies and it's very pleasant to have opportunities to explore it a little bit. We were lucky enough to see all the big stuff under water. Dinners like at restaurant!

Recommended for
We've seen all the stuff that can be seen under water in Cocos. Wonderful island in which we can land. Great food.
  • 8.0 Very good
  • Malcolm C
  • Malta Malta
Spectacular diving in Cocos

Schooling hammerheads, Galapagos and tiger sharks, Dolphins, oceanic manta, whale shark, countless reef sharks and rays but most impressive of all is the sheer amount of fish !!

Recommended for
Good boat, not too glitzy but comfortable, good food and great crew. Memorable dives.
  • 10 Exceptional
  • Michael P
  • United States United States
Worth waiting 49 years of diving for the beginning to the end perfect trip!

The Crew set the attitude for a great trip full of fun, cooperation, scheduling, excitement, experience and safe diving!

Recommended for
The Crew, Sea life and the Crew!
  • 8.4 Very good
  • Manuel L
  • Spain Spain

Underwater life is spectacular, which is the reason why I decided on this destination ... but after the trip, I get very good friends

Recommended for
Tiger Sharks, Crew and Cocos N. P.
  • 9.6 Exceptional
  • Robert H
  • Sweden Sweden
A unique diving experince

Definitely our encounter with the dolphins, I've seen dolphins during dives before but they've never sticked around this long or come up this close before, it was amazing! Such beautiful and intelligent beings:D The big schools of hammerheads were really cool too!

Recommended for
The dive sites, small group, lots of hammerheads!
  • 8.4 Very good
  • Annie B
  • Canada Canada

All dive were incredible ! The schools of hammerhead, the Tigers sharks, galapagos, silky sharks and i had multiple interactions with 2 frogs fish! Amazing

Recommended for
The sharks, the crew, the beauty of the ocean
  • 7.6 Good
  • Annie B
  • Canada Canada
Introduction of Costa Rica diving

The interaction with the giants mantas rays was incredible

Recommended for
The giant mantas rays, The crew and the island
  • 8.4 Very good
  • Mattheus W
  • Netherlands Netherlands
Amazing trip

Once in a lifetime experience!

Recommended for
Excellent crew, amazing wildlife, great food
  • 6.0 Review score
  • JOSE M
  • Spain Spain

Encuentro tiburón tigre

Recommended for
  • 7.2 Good
  • Richard S
  • Switzerland Switzerland
The diving is excellent, the company has room for improvement.

Schools of hammerheads.... wale sharks! (Alcyone, Small Dos Amigos, Dirty Rock)

Recommended for
Diving, Dive buddies, Crew
  • 8.4 Very good
  • Zvi Z
  • Israel Israel
Very pleast


Recommended for
Crew crew crew
  • 10 Exceptional
  • martini B
  • Canada Canada
Fantastic Great trip!

Schools of Hammerheads ,Tiger shark, Galapagos sharks , Biggest lobster i have seen ! Rays, all together we saw over 700 sharks in 21 dives!Roger my Brother and Diving Buddy always Fun when he enters without fins LOL !

Recommended for
Diving Food Staff
  • 10 Exceptional
  • JUAN L
  • Spain Spain

So many sharks everywhere. It is tough to get there but I would say it is one of the las paradises on earth.

Recommended for
The help, the food, the diving.
  • 9.6 Exceptional
  • Andreas S
  • Switzerland Switzerland
Fantastic dives and awesome crew ensuring a great overall experience.

Alcyone hammerhead dives Manuelita hammerhead and tiger dives Small dos amigos hammerhead and galapagos dives Whitetip night dives The food The crew

Recommended for
1. The wall of hammerhead sharks, 2. The tiger sharks, 3. The galapagos sharks
  • 8.4 Very good
  • vanessa J
  • United States United States
1st trip through liveabord.com, will not be my last

excellent service from most of the staff. Great mix of people from the US and Europe. Food was better than expected. YOU NEED TO HAVE WI-FI ON ALL BOATS.

Recommended for
fellow divers, most of the staff, service
  • 8.8 Fabulous
  • Nora S
  • Hungary Hungary
World-class diving, friendly and professional staff

The two favourite dive sites - Dirty Rock and Punta María - and the night dives has offered me a magic that i will never forget. The island is intact, true nature, the sky is full of shiny stars. On the top of this the staff is really professional and ready to serve the guest with the highest possibilities with a big smile. Lifelong experience. Thank you.

Recommended for
Unique dive sites, pristine nature, great service :-)
  • 8.0 Very good
  • Brenton S
  • Australia Australia
Cano Adventure

Mantas! Lots of sea life

Recommended for
Crew, food and the diving at Cano
  • 7.6 Good
  • Jamieson A
  • Canada Canada
Trip of a lifetime

The diving was incredible, one of the best places in the world to dive hands down. The food was plentiful and of high caliber, there was almost too much too eat. The crew was very hospitable and catered everything almost too well. The captain needs to realize that this trip is for the costumers and getting in the way with his huge camera while diving was an inconvenience. Although, his photos are amazing and I am happy that he provided them to us. But when a client is having an amazing experience with a Tiger shark, Hammerhead, Galapagos etc. the last thing they want is to have someone move in front of them (or their camera) to get a better shot.

Recommended for
The Diving, Food and Hospitality
  • 8.4 Very good
  • Anette S
  • Norway Norway
magical diving in Cocos island

My reason to go to Cocos island was to see sharks. I saw a lot of them, mainly hammerhead sharks, whittip sharks and some tiger sharks. The hole experience was amazing. Thanks to the chef who prepared delicious food every day.

Recommended for
Food, Crew and diving spots
  • 9.6 Exceptional
  • Heidi H
  • United States United States
Diving wirh the sharks was one of the most incredible and rewarding experiences of my life.

Diving with the hammerheads, white tips, and rays. Being in the ocean experiencing and being part of the ecosystem. And feeling safe thanks to Warren and the other dive masters. Also seeing the dolphins surrounding the panga on one of the dives. The food and service was excellent. Muchas Gracias!

Recommended for
The staff service with nitrox refills, donning BCDs and retrieving them at dive sites, and the excellent meals.
  • 9.2 Superb
  • Helena S
  • United Kingdom United Kingdom
Trip of a lifetime

3 new species of shark, including tiger! Remoteness of the destination felt very special.

Recommended for
Sharks galore, incredible service, brilliant photos taken by captain
  • 10 Exceptional
  • Nicholas B
  • United Kingdom United Kingdom
Okeanos aggressor and cocos rock

Fantastic experience, long way out, but makes it exclusive, fantastic amount of shark encounters, great boat and crew, great food, a must for all serious divers!

Recommended for
Sharks, sharks and what must be the best night dive in the world
  • 8.8 Fabulous
  • Neil K
  • United States United States
Great diving, excellent crew


Recommended for
Other divers on board were perfect, crew, diving
  • 9.6 Exceptional
  • paul B
  • United States United States
amazing liveaboard adventure

Great trip. I'm already planning the next one to a different point in Costa Rica. The only drawback has nothing to do with the Okeanos: seemingly due to national politics, the park fee to Cocos Isl has doubled two years ago to roughly $500.There has been a lot of grumbling about this. Thus, I won't be going back to Cocos until, hopefully after the next prime minister's election, this policy is amended to a more reasonable price.

Recommended for
  • 9.6 Exceptional
  • luis manuel A
  • Spain Spain
Best diving so far.

Had a blast!!

Recommended for
friendly crew, New diving friends, Whale shark!!
  • 9.2 Superb
  • Asger B
  • Denmark Denmark
Exelent very high level of service and very frendly staff

Brilliant 100 pct

Recommended for
The captain mr Beco 2 the dive sites 3 the very frendly and helpfull staff and exelent food
  • 9.6 Exceptional
  • Nicholas B
  • United Kingdom United Kingdom
Okeanos aggressor and cocos rock

Fantastic experience, long way out, but makes it exclusive, fantastic amount of shark encounters, great boat and crew, great food, a must for all serious divers!

Recommended for
Sharks, sharks and what must be the best night dive in the world