Tagus Cove is a sheltered bay located on the western coast of Isabela Island, situated below Darwin Lake. This site offers a varied underwater topography featuring reefs and walls suitable for intermediate divers. Access is exclusively by boat. Divers should be prepared for moderate currents and surge, with depths typically ranging between 20 and 40 metres. Visibility fluctuates between 10 and 25 metres. Water temperatures generally range from 18 to 23C, though significant drops are common due to upwelling from the Cromwell Current and frequent thermoclines. Hazards include cold water, strong currents, and surge. The site is also suitable for snorkelling.

Elizabeth Bay, located on the western coast of Isabela Island, features a combination of reef structures and pinnacles. Divers and snorkellers can explore depths between 12 and 20 metres, though the bottom profile descends to 25 metres. The site is subject to moderate currents and surge, requiring solid buoyancy control. Visibility typically ranges from 15 to 30 metres, though it can drop significantly to between 1 and 8 metres. Cold water upwelling from the Cromwell Current often creates thermoclines. Access is by boat only, and the site is suited for intermediate skill levels. The habitat supports a variety of reef fish and invertebrates typical of the Galapagos region.

Punta Espinoza, located on Fernandina Island, is a reef site accessible only by boat. The topography supports a variety of marine life, including very common wrasses and sea stars, alongside common cardinalfish and grunts. Divers and snorkellers may also encounter uncommon species such as California sea lions, horn sharks, king angelfish, groupers, blue-barred parrotfish, scorpionfish, pufferfish, Sally Lightfoot crabs, Panamic cushion stars, and sea hares. The site is known for its marine iguana colony, with individuals occasionally observed feeding underwater. Depths range from 6 to 24 metres, averaging 18 metres. Conditions include moderate currents, surge, and visibility between 8 and 30 metres. Cold upwelling from the Cromwell Current can cause significant temperature drops.

Tagus Cove is a historic deep-water bay located on the west coast of Isabela and Fernandina Islands. This site features a combination of reef and wall topography, with steep cliffs dropping into the water. Snorkellers can explore depths ranging from 8 to 30 metres, with an average depth of 24 metres. Access is strictly by boat due to the distance from shore. Conditions at this site vary, with visibility ranging from 6 to 30 metres and currents that can be strong. Given these environmental factors, the site is best suited for intermediate snorkellers.

Punta Morena is a boat-access reef site located off Isabela Island. The topography spans a depth range of 10 to 80 metres, making it suitable for intermediate divers. Conditions are variable, with visibility ranging from 10 to 30 metres and moderate currents that can strengthen. Divers should be prepared for thermoclines, which are prevalent at approximately 14 metres and cause sharp temperature drops. Water temperatures fluctuate between 17C and 23C depending on the season. Due to the depth and potential for strong currents, this site is intended for diving rather than snorkelling. Hazards include cold water, low visibility, sharks, and strong currents.

Moreno Point offers a unique snorkelling experience within a vast lava field on Isabela and Fernandina Islands. The site features a series of tide pools and lagoons where black lava formations contrast with turquoise water. Access to this site is by boat. Water temperatures vary throughout the year, ranging from 20C to 26C. Due to the nature of the environment, this site is rated for intermediate snorkellers. The topography is defined by the volcanic landscape, providing a distinct underwater setting for those exploring the coastal features of the region.

Cartago Bay is a sheltered, shallow bay located on the eastern side of Isabela Island. Surrounded by mangroves, the site provides a peaceful environment for snorkelers. Access to the bay is by boat. Water temperatures at this location vary throughout the year, ranging from 22C to 27C. Given its shallow nature and calm conditions, the site is suitable for beginners. The area serves as a nursery for various marine life, though specific species observations are not recorded for this site. It offers a quiet alternative to more frequented locations in the Galapagos Islands.

Trash Point is a reef dive site located off the Isabela and Fernandina Islands. Divers typically experience an average depth of 11 metres during 45-minute dives. Access to this site requires a boat. Conditions at the site are variable, with visibility ranging from 6 to 30 metres and water temperatures fluctuating between 21C and 26C throughout the year. The site is suited for intermediate divers due to the presence of moderate currents, surge, and the potential for cold water and low visibility. As a marine reef environment, the site offers a typical underwater topography for the region.