Join CREMA and The SeaChange Agency, on a scientific expedition to Cocos Island National Park, Costa Rica, as a scientific expedition sponsor! All expeditions will be led by Costa Rica biologist Randall Arauz, currently the Science and Policy Advisor for Marine Watch International.

Excellent opportunity for shark conservation enthusiasts and early career scientists who want to become acquainted with shark research field work at one of the sharkiest places in the world. Learn about the latest science and the policy changes needed for efficient shark conservation in the Eastern Tropical Pacific.


During the dives, researchers will tag sharks underwater using a pole spear to attach an acoustic transmitter. The pole spear anchors a dart under the shark’s skin, right under the dorsal fin. The tag is tethered to the dart by a steel cable, and dangles as the shark tows We may also change the tip of the pole spear and instead of a dart we use a tissue sampler, which works like a cookie cutter, punching a hole in the shark’s skin to obtain a sample the size of a bean. We focus on hammerhead sharks, Galapagos sharks, blacktip sharks, silvertip sharks, tiger sharks, whale sharks, manta rays and eagle rays. We also do active shark fishing to implant acoustic tags surgically.  This activity is done at 5:00 am and 5:00 pm, for two hours.

Any turtles encountered will be caught underwater and brought to the deck of the liveaboard, where it will be measured, weighed, photo-catalogued, tissue sampled, and tagged with external Inconel flipper tags.

We also support invited researchers who may use a variety of methodologies to study Cocos Island’s ecosystems, such as Baited Remote Underwater Video systems (BRUVs), stable isotope or e-DNA analysis.

During the evenings scientists on board will provide lectures on the work you are witnessing and the marine conservation policies we are propelling.


November 11 -21, 2023. = US$6000 + US$550 (National Park fee) = US$6,550

Cabin Double Occupancy. Add $500 if interested in a Double occupancy Suite.

On board the Okeanos II 

  June 25 – July 5, 2024. : US$6800 + US$550 (National Park fee) = US$7,350

  • Cabin Double Occupancy. Add $500 if interested in a Double occupancy Suite.
  • On board Okeanos III

 Aug. 27 – Sep. 6, 2024. $6,525 + 555 (National Park Entrance fee) = $7080

  • Cabin Double Occupancy. Add $650 if interested in a Double occupancy Suite.
  • On board the SeaHunter.

Rate includes: 3 meals a day. Complimentary non-alcoholic drinks, beer, snacks, nitrox refills, Evacuation Insurance fee (Okeanos) ($30), and Dive Master.

ATTENTION: Both dive companies (Okeanos and SeaHunter) reserve the right to an overcharge of $200 for fuel compensation, but this would be announced at least two weeks prior to the expedition to be paid at the site and is subject to the global market. Does not include tips nor snacks during San José – Puntarenas bus transfer.


You must fly into Costa Rica the day prior to the expedition. The dive companies provide shuttle service from San José to Puntarenas. We will provide a list of hotels we prefer you stay at for pick-up convenience. However, if enough folks stay at a particular hotel we can arrange the pick up.

You will be picked up at your hotel in San José during the morning of Day 1 of the scheduled expedition, and shuttled by bus to Puntarenas, where the liveaboards (Sea Hunter and Okeanos) are docked. About a 3 hour ride. We stop for lunch (on your own) and should arrive in Puntarenas around 2:00 pm. We sail to Cocos Island at around 4:00 pm.

We will be sailing the rest of Day 1 and all of Day 2, arriving to Cocos Island in the very early morning of Day 3.  Our first dive is scheduled for 9:00 am on Day 3.

After the third dive on Day 9, we pack up and head back to Puntarenas.  We will sail the rest of Day 9 and all of Day 10.  We will have breakfast on board the liveaboards on the morning of Day 11, and then head back to San José.  We are scheduled to be at the airport (SJO) at around 11:00 am.

Some folks like to book flights back home on the afternoon of the day we arrive in San José.  Keep in mind that sometimes there can be delays on the road due to heavy traffic, so try to book a flight as late in the afternoon as possible if you are considering this option.

Requirements:  Advanced Dive certification, DAN insurance, Nitrox Certification.  Travel insurance is highly recommended.


 100% funds (except costs of international wires) will be refunded to clients if the trip is cancelled on our behalf.  Thus, we recommend you obtain travel insurance in case the expedition must be cancelled due to causes beyond our control (acts of God) and it is impossible for us to refund.

We require a $2,000 payment to book a slot on an expedition.

    November 11 -21, 2023.  = US$6000 + US$550 (National Park fee) = US$6,550

    • After an immediate first payment of $2000, a second payment of $2000 is expected by June 11.
    • Final payments must be done by September 11.
    • 50% refund if cancelled by the client 6 months prior to the expedition dates. No refund after.

    June 25 – July 5, 2024. : US$6800 + US$550 (National Park fee) = US$7,350

    • First payment of $2000 by September 24, 2023.
    • Second payment of $2000 by December 24, 2023.
    • Final payment by March 25, 2024.

    August. 27 – September. 6, 2024  = $6,525 + 555 (National Park Entrance fee) = $7080

    • First payment by February 12, 2023. A $2,000 payment is required to book your space. The sooner the better!
    • Second payment by December 15, 2023. An additional $3000 will be required.
    • Third payment by June 15, 2024.

    CANCELLATION POLICY FOR THE 2024 TRIPS: If the client must cancel a trip.

    • 100% funds will be refunded if requested by a client more than one year prior to the date of departure (except cost of international wires).
    • 50% funds will be refunded if requested by a client between a year and 6 months prior to the date of departure. However, if we can fill the space, we will refund the rest (except the cost of international wires)
    • No refunds if a cancellation is done 6 months prior to departure. However, if we can fill the space, we will refund the rest (except the cost of international wires).

    Bank Wire Information:

    For US citizens, please use our Fiscal Sponsor in the United States, Marine Watch International:

    Account Name: Marine Watch International
    Acct: 325171341687
    Wire Routing code: 026009593


    2440 16th Street #305
    San Francisco, CA 94418
    Phone: 415-867-8477
    Email: MarineWatch@gmail.com


    In case you want to deposit directly into our bank account in Costa Rica:

    Bank Name: Banco Nacional de Costa Rica
    USD Account #: 100-02-148-600593-3
    Beneficiary : Asociación Centro de Rescate de Especies Marinas Amenazadas
    Swift: BNCRCRSJ
    IBAN: CR27015114810026005939
    Bank Address: Av. 1 y 3, Calle 4. San José Costa Rica

    My contact information:

    Randall Arauz
    Marine Watch International
    +506 8708 8253