Okeanos Aggressor II, Costa Rica



  • Year-round diving to Cocos Island
  • Dive one of the exhilarating dive destinations in the world in comfort and luxury
  • Regular sightings of schooling hammerheads, countless white-tip sharks, manta rays, tuna, and whale sharks

The Okeanos Aggressor II liveaboard was built for comfort and stability to offer year-round diving at the remote islands of Costa Rica. The yacht provides comfortable accommodation for 24 guests in 12 en-suite cabins. Eight deluxe staterooms are located on the lower deck and have a double lower bed and twin upper bunk-style bed. On the main deck is the master stateroom with a queen bed and on the upper deck are two suites that have either two twin beds or one king bed.

On the main deck is the ship's restaurant where delicious cuisine with a varied and plentiful menu is served. Breakfast and lunches are buffet-style and dinner each evening is chef-prepared and served. On the top deck is the BBQ and shaded cocktail bar, perfect for unwinding with fellow guests to discuss the spectacular diving of the day. Here, you can also find comfortable loungers to do some tanning in between dives.

The Okeanos II liveaboard departs from Puntarenas, Costa Rica for the 36-hour crossing to Costa Rica. Guests can enjoy up to 21 dives at the UNESCO World Heritage site for the chance of big fish encounters like nowhere else. Aside from the incredible diving, guests will also be taken ashore to hike through the jungles of Cocos and swim in the many waterfalls.

Call us or book online today to reserve your space aboard the Okeanos Aggressor II liveaboard.

The Aggressor team have implemented additional measures in line with the recommendations from the Center for Disease Control (CDC, USA) or European Center for Disease Prevention and Control (ECDC, EU) with their 'Clean Refresh Sanitize' protocol to further ensure the safety of all guests on board. These measures include (but are not limited to) an increased frequency in cleaning and sanitizing public areas, guest rooms preparation procedure upgrade and rooms to be serviced twice daily.

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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), Fuel Surcharge (200 USD per trip), National Park Fees (396-554 USD), 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 120 feet
  • Beam 27 feet
  • Max guests 22
  • Number of cabins 11
  • 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 II Reviews

  • 8.6 Fabulous
  • 45 Verified Reviews
  1. Vessel
  2. Crew
  3. Food
  4. Diving
  5. Value
  • 8.4 Very good
  • Suzanne Z
  • United States United States
Big animal life not as abundant as expected/anticipated

Overall, boat, food and crew were great. White tip sharks abundant, other shark life averaged 1 or 2 per dive, with Galapagos, black tip, hammerhead and tiger sharks. Limited sites around Cocos. Crossings were better than expected. Water was very warm, 3mm wetsuit fine, but probably why the bigger life was limited, El Niño conditions?

Recommended for
Crew, comfortable Owners cabin, easy diving
  • 8.4 Very good
  • Glenn F
  • United States United States
Incredible diving experience

Plenty of sharks, hammers, galapagos, silkys, even saw a tiger. Plenty of fish. Action on every dive

Recommended for
diving, diving, food
  • 6.0 Review score
  • Kristi S
  • United States United States
Hammerheads galore

This was only my third liveaboard so I don't have a lot to compare this to. My first two liveaboards were so awesome, so this one was a bit disappointing. The standard cabins were very small. Only two dive masters for 19 divers. We did 23 dives and the diving was quite good. I just didn't feel the love from the crew like I did on my first two liveaboards. I didn't sense much passion for diving or hospitality. There are not a lot of options for diving in Cocos so maybe there wasn't a lot of motivation from the crew to make it an extraordinary experience for us.

Recommended for
  • 9.6 Exceptional
  • Gary F
  • United States United States
As good as indonesia on some dive sites

some sites had several schools of different kinds of fish, as well as sharks and turtles, all in one dive. I like to watch schools of fish. I have been to Indonesia on many dive vacations and Cano Island is as good as Indonesia for schooling fish on some dive sites.

Recommended for
evening meals were gourmet, staff provided good services, diving from the pangas was easy
  • 9.2 Superb
  • christine W
  • United States United States
Chris NJ

we saw lots of big stuffs like hammerhead, tiger sharks and white tip sharks

Recommended for
good diving and good foods
  • 6.8 Review score
  • Mingyu W
  • United States United States
tough dives and room for improvement of dive guides

Saw Manta, Sharks, Turtles and tons of fish, Moray. Made some friends over the trip. Boat is very on schedule. Some improvements can be made. 1. Diveguides can pass on more knowledge of the marine life around the dive spots. 2. Some more helps from the boat might be useful, like ear beer, sunscreen, fish id card, very minor, but can be useful for travelers.

Recommended for
friendly crew, nice food, nice buddies
  • 8.0 Very good
  • Michelle W
  • United States United States
Great diving cabins small

Diving with my 18 year old son. People on board were great. Cocos island is incredibly beautiful

Recommended for
Diving Safe Cocos Island
  • 9.2 Superb
  • Mary S
  • United States United States
Enchanting island teeming with under the sea life...amazing!

Seeing a Manta Ray, hammerheads, marble rays, spotted eagle rays, a Galapagos shark and the whale shark on Easter morning first dive of the day with dolphins playing in the water when we boarded the panga. Yes, all of this on one dive...spectacular!

Recommended for
Okeanos II crew, diving with lots of sea life, Cocos Island
  • 9.6 Exceptional
  • David D
  • United States United States
Truly a once in a lifetime experience.

Unbelievable diving with bunches of sharks at every site. Because we were at the end of the dry season there was little rain and calm seas making for a pleasant crossing and opportunities to visit the island. Can't say enough about the crew, they are dedicated to making your experience an enjoyable one.

Recommended for
The diving, the food, and a great crew.
  • 8.4 Very good
  • Randal P
  • United States United States
Great trip but we didn't get to dive enough.

Cocos is a world-class dive destination that is remote enough to still be well-preserved and not over-dived. The crew was fantastic, they were all very attentive to the guests at all times. The food was fantastic. The boat is comfortable but shows a little wear. My only complaint is that we only got 3 dives per day, or 21 over 7 full diving days. The website says to expect 3-4 per day (no night dives) or 23 total. There is a big time and money investment getting there, it would be nice to dive as much as possible, that's what we're there for. There was one diver in our group who had been on this same trip 2 months earlier and they had 23 dives, but we were told this is not allowed. With only 3 dives a day there is a lot of down time and not much else to do, so it would have been nice to max out the diving. I have been on 2 other Aggressor boats where we did 5 dives per day for 5.5 days, or 27 dives total - so more diving in less time and for much less expense. Something to consider... The diving itself was amazing about half the time, and so-so the other half due to some reduced visibility when storms churned up the water or just due to luck. There were lots of white-tips and many hammerheads, enormous schools of jacks and other fish, rays of all types, huge tuna, and coral in good condition. We saw one whale shark. Some in the group saw mantas and galapagos sharks; the tiger shark(s), if present, were elusive. Overall, I really liked everything about this trip and would highly recommend it, but they should have 4 dives per day instead of just 3.

Recommended for
1. The diving. 2. The crew / service. 3. The food.
  • 9.2 Superb
  • james W
  • United States United States
An amazing trip with exciting diving and fun filled down time between dives.

Variety of marine life and the crew.

Recommended for
The crew. The diving. The other people on board.
  • 6.4 Review score
  • Stephanie Y
  • United States United States
Only if there is a good discount in the total price.

I traveled alone and I was lucky because people (divers) I met there were very friendly and easy-going. On the other hand we had very good dives, normal dives and not so good dives.

Recommended for
Companionship, calm sea and hammerhead sharks.
  • 10 Exceptional
  • Michael J
  • United States United States
Great option for cocos!

The crew was very friendly and accommodating, food was excellent. Dives were safe and enjoyable. This is a great option to see cocos and more budget friendly than the alternatives.

Recommended for
Saw tons of hammerheads, a whale shark, and enjoyed the underwater life in the pacific.
  • 3.6 Review score
  • Anthony D
  • United States United States
Probably one of the worst liveaboatds boats. I’ve been on in terms of dive deck space, camera table space. Literally people on top of each other while gearing up for each dive. Crew seemed to be in a

Seeing new species of fish and sharks.

Recommended for
  • 8.4 Very good
  • Brian B
  • United States United States

Seeing Coco island and the large number of sharks, rays, tuna, and schools of jacks and trevally

Recommended for
Dive sights. Dive Masters. Crew friendliness and attention to customers
  • 9.2 Superb
  • Joanna L
  • United States United States
Trip of a lifetime

The diving exceeded expectations, the crew was so hospitable and went out of their way to make sure we lacked for nothing, and the food was the best I've ever had on a liveaboard. The only criticism, is that the boat's common areas could use a little updating.

Recommended for
Diving, crew, and food!
  • 8.8 Fabulous
  • Peter M
  • United States United States
Terrific experneice

I'm going to use this space to provide what I hope is helpful commentary. As indicated by the ratings I gave, the experience was excellent. Two small things, though. The showers in the cabins are substandard. Don't know if this can be fixed/upgraded. Also, the exhaust from the engines and/or generator delivered a lot of soot to the back deck. Our feet were black, and the gear got dirty from it, too. Extend the exhaust pipe higher, or something?

Recommended for
sharks, weather, abundance of fish
  • 9.2 Superb
  • Corinne K
  • France France
An unforgettable trip

The dives were diversified but their quality consistent and most of them were as fun as they were extraordinary. My cabin (the Master cabin) was just perfect and I loved the exquisite attentions on some evenings (chocolate on the pillow etc). But I found the sandard cabins really very small, especially considering the price (that's the reason of the 4 stars "only"). I would like to point out the professionalism, efficiency and friendliness of all crew members, from the cleaning man to the captain. They are all précieuse and really made this trip all the more enjoyable and all the more difficult to leave at the end. The food was also absolutely fantastic and the chefs accomodated me with delicious dishes accordingly to my vegetarian diet. Even though the boat is obviously not brand new, I found it beautiful and well maintained and enjoyed every moment on what felt like a floating home away from home. If the trip was not so expensive (one of the only flaws I can se), I would definitely do it again next year, and maybe the next, and over and over again.

Recommended for
The beauty and remoteness of dive sites and of the Island, the crew, the food
  • 9.2 Superb
  • Annamaria B
  • United Kingdom United Kingdom

The highlight of the trip must have been being face to face to a tiger shark right away on check dive...and it only went up from there!

Recommended for
Pristine Nature Shark Diving, Great Food and Fantastic Crew!
  • 9.2 Superb
  • Jesus S
  • Spain Spain
Perfect sport for shark lovers

Cocos Island is a fantastic option for shark lovers due to the variety you can find at each dive. It is a long trip from Costa Rica but completely worth it. The crew did a great job to make sure we all felt comfortable. Special mention to the chef and his assistant, who amazed us every day with fantastic dinners.

Recommended for
Dive sites, marine faura, food onboard
  • 8.8 Fabulous
  • Lena L
  • Norway Norway
One of those bucketlist destinations...Has to be done at least once!

Diving against the classic 'wall of hammerheads' on Dirty Rock and getting up close with my first two tiger sharks. Everything is also super sized here, the sharks, the enormous (!) schools of fish, the multiple rays (we had two surprise mantas our week). Note that the boats travelling to Cocos are more simple than most of the luxury liveaboards you get in e.g. the Red Sea and Maldives, but hey, you have everything you need and who cares when diving this great!

Recommended for
Tiger sharks, hammerhead sharks, galapagos sharks!
  • 8.4 Very good
  • Fabian S
  • Germany Germany
Wahnsinnstauchplätze und riesige Galapagoshaie

The absolut highlihts of this trip were the schools of hummerheads, the very closed big fat galapagos sharks and fantastic guests. The hospitality of the crew was amazing. The best liveaboard food we ever had on a liveaboard! Additional a very good organisation. Coco`s is not the cheapest place to dive but one of the best of value for money! I strongly recommend it!.

Recommended for
the galapagossharks, the guests and the crew
  • 10 Exceptional
  • Cita M
  • Slovenia Slovenia
First but not the last liveaboarad trip

Hammerheads, Galapagos sharks, good diving team, dynamic driving with Pangas, full service.

Recommended for
Sharks, the crew and the expedition to Cocos Island
  • 8.4 Very good
  • Eric S
  • Canada Canada
So many sharks

The diving was great so many shark encounters on every dive. Schools of White tips and hammerheads. Galapagos Sharks galore. The food was amazing, th staff attentive. A shout out to Captain Carlos and to Edwardo.

Recommended for
Food, sharks, staff
  • 9.2 Superb
  • Alexander S
  • Austria Austria
awesome and unforgettable dives - big THX!

big thx to carlos & crew! best was the relaxed and flexible and friendly crew & nice boat!

Recommended for
tauchen, tauchen tauchen und die super crew / staff!
  • 9.2 Superb
  • David T
  • Canada Canada
Had a great time and met great people

The small trips to the island were cool. The Diving was amazing.

Recommended for
The diving, the staff and the food
  • 8.8 Fabulous
  • Takashi D
  • Japan Japan
Awesome exparience!

I could see hummer head shark in "All dive".

Recommended for
Hummer head sharks, huge school of jacks, whale sharks
  • 9.6 Exceptional
  • China China
Although it's far by boat, it's worth going

See a lot of sharks and experience great boat service

Recommended for
1. See a lot of hammerhead sharks 2. Land travel is great The service on board is very good
  • 8.0 Very good
  • Sebastien F
  • France France
Wonderful liveboard experience in Cocos Island!

Saw many sharks: many Hammerheads, Galapagos, Tiger (one encounter in particular was just amazing!), Silk, Silvertip, counteless number of white tips. Saw mobula, eagle and marble rays. We also spotted dolphins on the surface. Big school of jack fishs and seabass. The reef life is also rich.

Recommended for
Adventure in a remote and pristine area. Magnificient marine life. Crew very professional
  • 8.4 Very good
  • Jerome L
  • France France
Experience the magic of Cocos !

I came for the hammerheads, and saw some on almost every dive !

Recommended for
Top Class Dives - Wondeful island - Good Atmosphere
  • 9.2 Superb
  • Denis E
  • United Kingdom United Kingdom
Cocos island in luxury

The chef was brilliant as were the crew who did everything to make the guests feel welcome. The visibility was a bit poor but we still got to see many sharks and Manta Rays. The only thing that spoilt it was that I was not told that a pcr test was required before being allowed to board which cost me a lot of money last minute.

Recommended for
The crew were exceptional, the food magnificent and the Whaleshark on the last dive.
  • 8.0 Very good
  • Nora I
  • Spain Spain
Great diving with sharks.

Many sharks and rays, as well as abundant smaller life. Diving is worth the 1.5 day it takes to get there. The crew is very friendly and helpful at all times. Visibility around 12 meters, so not great. We went three times to the island. It’s beautiful and very virgin. Nitrox and National park fees are not included (to be payed in the boat) even though they are required to dive there. Nitrox is $150 and Coco Island park fee $600 as of Feb 2022.

Recommended for
Marine life, friendliness of the crew and food.
  • 8.8 Fabulous
  • Efrain I
  • Panama Panama
Nature is still the best adventure.

Tiger Sharks!!!

Recommended for
Crew's disposition. Food. Diving.
  • 6.8 Review score
  • Bernhard K
  • Germany Germany
Good diving and excellent food!

Besides the diving, the Sushi-Dinner!

Recommended for
Diving with Sharks - Tiger-, Whale- and Hammerhead Sharks
  • 9.2 Superb
  • Jörg W
  • Switzerland Switzerland
Once in a lifetime experience - just amazingly wonderful COCOS ISLAND !

Best diving with hundreds of hammerhead sharks, groups of Galapagos sharks, many white tips, some black tips, eagle and marble rays and an unlimited number of tropical fish. Many different dive sites, some with quite a bit of current. The climb of Cerro Iglesias was also a highlight of my trip to Cocos Island. Okeanos Aggressor II boat was very convenient, great food and an incredibly nice crew.

Recommended for
1. Safety first / 2. Wonderful crew / 3. Great dive sites
  • 9.2 Superb
  • Sandra H
  • Austria Austria
Diving was amazing the dive guides too also the every other crew member too. Kind, helpfull, thinkfull.

Diving for sure :-)

Recommended for
Diving Crew View
  • 7.6 Good
  • Josh G
  • Puerto Rico Puerto Rico
It was an amazing adventure to the Coco's islands

It was a great trip overall. The diving was great and we saw almost all there is to see in the Cocos besides whale sharks and tiger sharks but plenty of other stuff. The rooms could use some new sheets and pillows to make it a bit more comfortable, and quite small but they did the job. If I had to share with someone that I didn't know, probably would have been much more of an issue. However, they were nice enough. The shower in the room never got hot and the soap dispenser didn't work but there are amazing showers out back for after the diving that were hot and a perfect end to every dive. The coolest part of the boat for sure. I expected a bit more for the cost but it was overall an excellent adventure. The food was excellent but the fact there is no alcohol on board is quite disappointing since the cost is so expensive and that is why that is a 4. The diving was superb. Not as good as other places I have been but still top of the game and we all had a blast diving. Agressor Galapagos was a far superior trip in all ways if I must say. Except the cold water! The water in the Cocos was amazing. 72-87 degrees. 2/3mm suit is perfect. I went in February.

Recommended for
Sharks, Food, and outdoor shower!
Origin: US