Okeanos Aggressor, Costa Rica

Excellent crew and service

“This is trully a bucket list experince for experienced divers. The diving can be challenging in terms of depths and currents. The …”

alf A, United States United States
Read 74 more reviews


  • Dive with Hammerheads, Eagle rays, and Whales at one of the worlds’ top dive destinations - Cocos Island
  • Soft drinks, iced tea, beer, and wine are complimentary
  • Fully kitted dive deck including personal storage lockers, three-tier camera table with low-pressure air hoses and warm freshwater showers

The Okeanos Aggressor I liveaboard schedules year-round trips to Cocos Island, one of the worlds’ top diving destinations. Diving in Costa Rica means the chance to get up close with schooling hammerheads, mantas, whale sharks, tiger sharks, white tip reef sharks, rays, turtles and huge schools of fish. There is a 36-hour crossing to Cocos Island, but divers will be rewarded with incredible diving and big-fish action and up to 24 dives on the 10-night trip are available. The dive deck is spacious and allows ample room for kitting up, personal gear storage and camera equipment. Nitrox is also available for those certified.

The Okeanos Aggressor I liveaboard offers comfortable lodgings for 22 guests in `4 deluxe cabins, 2 twin cabins and 1 quad cabin located on the lower deck, and 3 deluxe cabins located on the upper deck. Each stateroom is en-suite with individually controlled AC, TV and media player and ample storage space. Meals are served in the large dining room and consist of a variety of freshly prepared cuisine of local flavours, American and BBQ. There is also a large salon with an entertainment system, complete photo centre and library, and on the sun deck are comfortable loungers, deck chairs, bar and grill. The highly trained and experienced crew of the Okeanos Aggressor are ready and waiting to share the magical beauty of Cocos Island both above and below the water.

Book your Okeanos Aggressor liveaboard easily online today.

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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 (396-554 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
  • 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

  • 8.7 Fabulous
  1. Vessel
  2. Crew
  3. Food
  4. Diving
  5. Value
  • 8.8 Fabulous
  • alf A
  • United States United States
Bucket list trip!

This is trully a bucket list experince for experienced divers. The diving can be challenging in terms of depths and currents. The rewards in terms of sharks and other marine life are awe inspiring. The island itself is another adventure, drenched in rain and covered with birds. The vessle is older but very seaworthy. Accomodations are a bit cramped. The food and company onboard is great. Also free beer and wine AFTER diving. The crew are experienced dive guides with careful and consistent attantion to diver safety.

Recommended for
1)Diving with lotts of sharks 2) Careful attention to diver safety 3) Visiting the enchanted island
  • 8.0 Very good
  • Jack B
  • United States United States
Great dive trip…SO MANY HAMMERHEADS…

Sharks, sharks, and more sharks…

Recommended for
1. Location is incredible, though long getting there. 2. Food was good and the chefs and help are very diligent. 3. Shore trips were a nice plus.
  • 9.6 Exceptional
  • Nathan W
  • United States United States
Incredible experience only matched by the incredible staff on board.

Seeing the hammerheads up close, a whale shark and swimming with the dolphins. The vibe was super positive with the staff and other guests on the trip so not a bad way to spend 10 days stuck on a boat together.

Recommended for
Diving, staff friendliness and food
  • 9.2 Superb
  • Chad L
  • United States United States
Top notch in every aspect!

The diving was incredible- hammers on every dive (and whitetips, blacktips, Galapagos, silvertips), lots of rays, schools of jacks/snapper/grunts, frog fish, flounder, lobster, and hundreds of other types of fish. Swimming under waterfalls our playing soccer on the beach between dives...all in paradise. I can't wait to go back!

Recommended for
I have been on a number of liveaboards and the Okeanos/Cocos was #1 in both the diving and the staff. We were seriously well taken care of- friendly staff, consistently excellent food, efficiently managed dives,, and oh my, what dives! Healthy reefs teaming with life on all scales, all in the midst spectacularly beautiful location!
  • 10 Exceptional
  • George S
  • United States United States
Great crew, great food, beautiful dives

Every dive was a shark dive, and we got to see a variety of these majestic creatures every day. We also took shore trips to bathe in rivers and waterfalls. Every meal was nutritious and gourmet, with just the sorts of food needed to sustain diving.

Recommended for
Beautiful dives/setting, quality of food, professionalism of crew
  • 9.2 Superb
  • Sheri C
  • United States United States
Once in a life time experience.

Did three 100 foot dives a day for 7 days with my wife and two sons. Saw numerous sharks and other species in a natural environment that appears to be not to harmed by man. The crew could not have been any nicer or accommodating. They take their jobs seriously and are good stewards for the island.

Recommended for
The diving, crew and food
  • 7.6 Good
  • Luis L
  • Canada Canada
Pretty good, but not as good as expected

Giant mantas, getting pretty close to several sharks and to dolphins. The desserts were great, and the food was pretty good. The service was good and the divemasters were pretty good, but we saw way fewer sharks than expected. On some dives we didn't really see any (besides white tips), and on many dives we were lucky to see one or two. Still, if it weren't for the high expectations, I would say it was great.

Recommended for
Sharks, mantas, food
  • 9.6 Exceptional
  • Niklas P
  • Sweden Sweden
Great diving and great service!

The diving is just great! We made 21 dives, hammerheads on all of them. Many other type of sharks and much more fish life than I expected. The crew was fantastic. They were very helpful and friendly! And the food was excellent, probably the best chef in all Costa Rica!

Recommended for
The diving, the crew and the food.
  • 8.4 Very good
  • Hermann Q
  • France France
First time on a LiveAboard and good experience

La convivialité Les rencontres Les spots de plongées

Recommended for
Être sur place
  • 10 Exceptional
  • Jake C
  • United Kingdom United Kingdom
Once in a lifetime experience

The diving is simply superb and topped off by a brilliant and professional crew. It’s the little things that count and they crew go that extra mile to ensure your comfort and enjoyment of the trip.

Recommended for
The incredible diving, the amazing crew, and the food!!