Shark Fin Rock is an exposed oceanic pinnacle located off Cocos Island, Costa Rica. The site features a reef structure dropping from 15 to 40 metres, with an average depth of 25 metres. Divers encounter strong currents and occasional cold thermoclines, requiring advanced skills and solid buoyancy control. Visibility typically ranges between 10 and 30 metres. The site is accessible only by boat, and night diving is available through liveaboard operators. Species recorded around this area include whitetip reef sharks, spotted eagle rays, various moray eels, groupers, and wrasses. Due to the surge, swell, and strong currents, divers must maintain close contact with their guide throughout the 50-minute dive.

Alcyone is a seamount pinnacle located off Cocos Island, accessible only via liveaboard. The site features depths ranging from 25 to 36 metres, with an average depth of 27 metres. Divers experience strong, shifting currents and visibility between 15 and 35 metres. Water temperatures typically range from 25 to 28C, though thermoclines can cause temperatures to drop to 18 to 22C below 25 metres. Due to the depth, strong currents, and potential for surge, this site is suited for advanced divers. Divers must follow guide briefings closely and maintain awareness of potential hazards including cold water, deep conditions, and entanglement risks.

Bajo Alcyone is a deep-water pinnacle located off Cocos Island, Costa Rica. This advanced dive site features a reef structure with working depths between 25 and 40 metres, averaging 30 metres. Divers must access the site via boat, as it is located 550 kilometres from shore. Conditions are challenging, characterised by strong currents and visibility ranging from 15 to 35 metres. Thermoclines are common, particularly during the wet season, causing abrupt temperature drops. Due to the depth and current, this site requires precise gas management and buoyancy control. Divers should time their descent for slack water or the early push of current to manage bottom time effectively.

Punta Maria is a high-energy wall and reef site located 500 metres off Cocos Island. This advanced dive features depths ranging from 20 to 36 metres, with an average depth of 25 metres. Divers encounter strong currents, surge, and variable visibility between 15 and 30 metres. Thermoclines frequently cause temperature drops within the 25 to 28C range. Due to the exposed nature of the site and unpredictable current shifts, boat entry is required. Divers must possess advanced certification and strong buoyancy control skills to navigate this remote environment. Always confirm conditions with your liveaboard crew and maintain a surface marker buoy for safety during drift dives.

Bait Balls is an advanced open-water site located off Cocos Island, Costa Rica. The topography consists of a complex mix of reef, wall, and pinnacle formations ranging from 18 to 40 metres in depth. Divers encounter strong, unpredictable currents, requiring high proficiency in buoyancy control and current management. Visibility varies between 10 and 30 metres. Water temperatures typically range from 24 to 27 degrees Celsius, though thermoclines frequently cause temperatures to drop significantly below 25 metres. Due to the depth profile and current conditions, Nitrox certification is required. Boat access is mandatory, and the use of a surface marker buoy is essential for safety.

Isla Cascara is a reef site located within the Cocos Island marine reserve, accessible only by boat. The site features a reef and cave system with an average depth of 25 metres. Water temperatures are warm, typically ranging between 27 and 30 degrees Celsius, though thermoclines can cause temporary drops. Visibility fluctuates between 10 and 30 metres, and divers should be prepared for variable conditions. While currents are generally mild, the site is subject to surge and swell. Night diving is permitted, offering an alternative perspective of the reef structure. Divers should exercise caution regarding sharp coral and rock formations while navigating the area.

Big Dos Amigos is a deep pinnacle and reef site located off Cocos Island, Costa Rica. Designed for advanced divers, the site features depths between 20 and 40 metres with an average of 25 metres. Strong currents and surge are defining characteristics, requiring confident drift technique and buoyancy control. Visibility varies from 10 to 30 metres. Access is strictly by boat, and the site is not suitable for snorkelling. Divers must be prepared for deep water conditions and potential cold thermoclines. Always carry a surface marker buoy, as currents can displace divers from the boat during ascent.

Small Dos Amigos is an exposed drift dive located off Cocos Island, Costa Rica, characterised by strong currents and open ocean conditions. The site features a reef topography ranging from 23 to 50 metres, with an average depth of 25 metres. Due to the significant surge, swell, and current, this site is strictly for advanced divers who possess solid buoyancy control. Visibility fluctuates between 10 and 30 metres. Access is exclusively by boat, and divers must remain alert for heavy boat traffic in the area. A surface marker buoy is essential for all dives at this location to ensure safety in the open water.