• Cocos Island Aggressor

Cocos Island Aggressor

Join Motor City Scuba

May 3-13, 2025

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Cocos Island


10 Days of sharks, sharks, sharks–and even more sharks!

Schooling hammerheads, countless white-tip sharks, mantas, tuna and even whale sharks call Cocos home.

Escape with Aggressor to Cocos Island on our Costa Rica liveaboard scuba diving adventure! Cocos is a lush, green uninhabited island resting 342 miles off Costa Rica's Pacific coast. Rocky pinnacles surrounding Cocos are beacons for big animals and big action. Schooling hammerheads, countless white-tip sharks, mantas, tuna and even whale sharks call Cocos home.

Boarding and departure time from Puntarenas, Costa Rica depends on the tide schedule. Immediately after boarding for our Costa Rica liveaboard scuba diving adventure, the yacht departs for its 36-hour crossing to Cocos Island. There are multiple dives throughout the day for an average of 21 dives on 10-night charters. No night diving is currently offered at Cocos Island.

Water temperatures range from 72 - 82F, 22 - 28C with cooler thermoclines. 5 mm wetsuit recommended

The Okeanos Aggressor I & II are each equipped with two 8' x 22' tenders.  All dives from tenders.

Cocos Island National Park was designated a World Heritage site by UNESCO in 1997. Weather permitting, all guests are shuttled ashore to hike through the jungles of Cocos and swim in her many waterfalls. All ten-day trips offer seven days of Costa Rica liveaboard scuba diving.

10 Nights Sample Itinerary

Day 1 - Meet in front of pickup hotel (See last page of "Know Before You Go" for pick up time). Transfer to Puntarenas for boarding and departure for Cocos Island.

Day 2-3 - Arrive to Cocos Island, diving begins.

Day 4-9 - Eat, Sleep & Dive.

Day 9-10 - Travel back to Puntarenas.

Day 11 - Check out at 7 am and transfer to San Jose Airport or host hotels.


Cocos Top Dive Sites


A 600’ long submerged mountain, the top of the mountain is 75’ from the surface. Schooling Hammerheads, Mantas and schooling fish. Possible Sailfish or Marlin.

Big Dos Amigos

This islet features a 45-foot-high arch and 60-foot pinnacle off the southeast side. Look for Rainbow Runners, Yellowtail Snapper, Bigeye Jacks and lobster. Hammerheads swim between the pinnacle and arch.

Bird Island, Chatham Bay

Dove from Chatham Bay, southeast of Manuelita, this site provides a variety of marine life including Frog Fish, lobsters, morays, rays, White Tip Sharks and Hammerheads. There is even a cleaning station.

Dirty Rock

A large island with schools of Marble Rays and Hammerheads.

Lone Stone

Schooling Marble Rays and Mobula Rays.


The northeast corner has asheer wall. Lots of White Tips, Marble Rays and schools of Creoles.

Special Sightings

Whale Sharks, mating Eagle Rays, Sail Fish, mating White Tip Sharks, False Killer Whales.

Ubing Rock, Wafer Bay

This 300’ rock begins at 20’ and drops to a 110’ sandy bottom. The southeast slope attracts schooling Hammerheads.

Sample itineraries and maps are for illustrative purposes only. The exact route and sites visited are subject to change based on local regulations, guest experience, weather and logistics, and is at the Captain’s discretion.


Additional local taxes/fees:

  • Cocos Island Park Fee $490 plus 13% government tax may be paid in cash or by credit card (with a fee)
  • Cocos Island Emergency Evacuation Plan: $30

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