Tortuga Island is an extinct volcanic caldera featuring a distinctive crescent moon shape. Located 2000 metres from the shore of Isabela Island, this site is accessible only by boat. The topography consists of a deep-water reef environment with depths ranging from 18 to 34 metres, averaging 25 metres. Conditions at this site are variable, with visibility fluctuating between 3 and 33 metres and strong currents present. Due to these challenging conditions, the site is suited for advanced snorkellers. Water temperatures range from 21C to 27C throughout the year, depending on the month.

Concha de Perla is a sheltered lagoon located near Puerto Villamil on Isabela Island. This site offers shallow diving and snorkelling at depths between 1 and 4 metres, with an average of 3 metres. Divers and snorkellers frequently encounter California sea lions and wrasses. Other species recorded here include blue-barred parrotfish, spotted eagle rays, whitetip reef sharks, reef octopus, pufferfish, and various surgeonfish and butterflyfish. The site is accessible from the shore and features moderate currents. Visibility ranges from 4 to 15 metres, and water temperatures fluctuate between 21C and 27C. Facilities including toilets, showers, and equipment rental are available nearby.

Las Tintoreras is a group of small islets located 300 metres from Isabela Island in the Galapagos Islands. The site features a reef and artificial reef topography, including a narrow lava crevice where white-tip reef sharks are known to rest during the day. Diving and snorkelling occur in a sheltered bay with depths ranging from 2 to 20 metres, averaging 5 metres. Access is by boat only. Conditions include mild currents and visibility between 5 and 25 metres. Water temperatures fluctuate between 18C and 24C depending on the season, making wetsuits advisable. The site is suitable for beginners and offers a 4/5 rating for snorkelling.

Galaisa Adventure Travel Agency offers a shore-entry reef dive in the Galapagos Islands. This site is accessible year-round and is suitable for beginners due to its shallow depths and generally calm conditions. Divers should remain aware of their position as currents can shift significantly. Hazards include sharp coral and rocks, as well as stonefish, sea urchins, jellyfish, and sharks. Maintain a safe distance from all marine life. Water temperatures range from 21C to 27C throughout the year. Always check locally for current facility availability before arrival, as services can change. Stick close to your buddy and keep the entry point in sight at all times.

El Estero is a shallow mangrove environment located at the end of the Wetlands trail on Isabela Island. This site features a unique interface where a freshwater spring meets the sea. It is best accessed from the shore during low tide, when the water forms shallow pools. The site is suitable for beginners and is primarily a snorkelling location. Water temperatures at this site vary throughout the year, ranging from 21C to 27C depending on the month. Due to the shallow nature of the mangroves, it provides an opportunity to observe the local environment in a calm, protected setting.

Los Hermanos is a reef site located off Isabela Island in the Galapagos. The topography features a drop-off that descends from 25 metres to depths of 90 metres. Divers typically remain in the shallower sections of the reef, where conditions are manageable with mild currents. Visibility at the site ranges from 10 to 30 metres. Water temperatures fluctuate between 18 and 24 degrees Celsius, necessitating a 5mm wetsuit to maintain comfort. Access to the site is exclusively by boat. Divers should confirm logistics and operator requirements with a dive centre on Isabela Island prior to departure.

Los Túneles is a marine site defined by a series of lava tunnels and volcanic arches. Located 15 kilometres from the shore, this site requires boat access and offers depths ranging from 1 to 10 metres, with an average depth of 5 metres. Conditions include mild currents and visibility between 5 and 25 metres. Water temperatures fluctuate between 20 and 25 degrees Celsius, with cooler conditions occurring from June to November. Due to the presence of overhead environments, sea urchins, and potential surf, guided tours are recommended. The site is suitable for beginners and provides opportunities for both diving and snorkelling.

Los Túneles is a distinctive site defined by a labyrinth of lava bridges and underwater tunnels. Located off Isabela Island, this marine location offers calm water conditions suitable for beginners. Access to the site is by boat. The water temperature varies throughout the year, ranging from 21C to 26C. Snorkellers can explore the unique geological formations created by the lava structures. The site is rated highly for its calm environment and accessibility, providing a stable setting for those looking to observe the underwater topography of the Galapagos.