Okeanos Aggressor, Costa Rica



  • 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
  • 74 Verified Reviews
  1. Vessel
  2. Crew
  3. Food
  4. Diving
  5. Value
  • 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
  • 8.8 Fabulous
  • Stella S
  • Brazil Brazil

Sushi night at the rooftop, the kindness of the crew

Recommended for
Diving, crew service and food
  • 8.8 Fabulous
  • Jess G
  • Canada Canada
Unbelievable trip best staff I've ever experienced diving both live aboard and land based.

Where would one begin? My first whale shark in 30 years of diving, or maybe the dive where simultaneously we had a huge Manta ray two hammer heads three Galapagos Sharks a Large Tiger shark and a two hundred pound Tuna rolls through. Every meal was a highlight as was the entire staff perfect organization. Without question the best live aboard ive done. That starts at the top nice reflection on the Captain.

Recommended for
The staff on the Okeanos 1, the group of people on the boat and of course the absolutely spectacular Cocos island both above and below the water.
  • 9.6 Exceptional
  • Jim 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.
  • 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
  • 10 Exceptional
  • martin 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
  • 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
  • 8.0 Very good
  • Michael V
  • Austria Austria
Super Tauchsafari mit netter Crew auf einem alten Schiff

Cocos Island ist auf jeden Fall eine Reise wert. Die Insel ist auch über Wasser atemberaubend schön und ein Paradies für Naturliebhaber. Die Crew war einfach überragend und sehr zuvorkommend, man merkt hier jedem "Pura Vida" an und ist selbst schnell auf der selben Wellenlänge. Die Tauchgänge waren toll mit zahlreichen Hailights wie Hammerhaien, Blacktips, Riffhaien und riesigen Tunas - die Tigerhaie und Walhaie haben wir aber nicht gesehen (waren vermutlich auf Urlaub).

Recommended for
Unterwasserwelt, Crew, Essen