Tersane Island, the largest island in the Gulf of Fethiye, offers a shallow dive and snorkel experience within a sheltered bay. The site features submerged Ottoman shipyard ruins, including sunken boathouses and ancient foundations located just below the surface. Divers and snorkellers can explore these structures at depths ranging from 1 to 8 metres, with an average depth of 4 metres. The area is suitable for beginners, with mild currents and visibility typically between 10 and 30 metres. Access is by boat only. The habitat supports a variety of regional reef fish and invertebrates. Facilities at the island include a cafe.

The Coastguard Wreck is an artificial reef site located in the Gemiler Island area. Resting at depths between 18 and 30 metres, with an average of 24 metres, the wreck is integrated into the surrounding reef structure. This site is suited for intermediate divers, particularly those with wreck certification. Divers can expect mild currents and visibility ranging from 10 to 30 metres. Water temperatures fluctuate between 18 and 23 degrees Celsius throughout the year. Access to the site is by boat only, with operators available from Oludeniz. Bringing a torch is recommended to explore the interior sections of the vessel effectively.

Aquarium is a reef and wall dive site located in the Gemiler Island area. The site features a sheltered bay with an easy entry, where the topography transitions from rocky outcrops and sand to a drop-off. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 12 metres. Conditions are generally favourable, with visibility between 15 and 40 metres and mild currents. Due to the presence of boat traffic and varying depths, divers should maintain awareness during their ascent and safety stops. This site is suitable for beginners and is accessible exclusively by boat.

Big Reef, also known as Dalyan Reef, is a large wedge-shaped reef located 500 metres from the shore near Gemiler Island. The site features a reef top at 10 to 12 metres, with a wall dropping to 40 metres at the south-east corner. Divers typically experience moderate currents, making this an intermediate-level drift dive. The topography includes rocky stacks and varying depths, with an average dive depth of 16 metres. Access is by boat only. Visibility ranges from 10 to 25 metres, and the site is suitable for night diving. Divers should remain aware of boat traffic and the potential for reduced visibility.

Sarıyarlar is a diverse dive site located in the Gemiler Island area, featuring a mix of reef, wall, cavern, and cave topography. The site offers a variety of underwater features including canyon-like rock formations and a sandy and rocky bottom. Divers can expect depths ranging from 5 to 30 metres with mild currents and visibility between 15 and 30 metres. Suitable for beginners, the site is accessible by both shore and boat. It is also a location for night diving. Water temperatures fluctuate between 18C and 23C throughout the year. Divers should remain aware of boat traffic and depth limits while exploring this area.

Dalyan Bay Drop Off is a wall and reef site located in the Gemiler Island area. The site features a maximum depth of 30 metres with an average depth of 16 metres, making it suitable for beginners. Divers access the site by boat, encountering mild currents and visibility ranging from 10 to 25 metres. Water temperatures fluctuate between 18C and 23C throughout the year. The site is also well-suited for night diving, with typical dives lasting around 35 minutes. Hazards include boat traffic and sharp coral. This location provides a straightforward underwater environment for those developing their diving skills.

Dalyan Bay, located in the Gemiler Island area, offers a shallow and calm environment suitable for beginners and training. The site features a diverse topography including rocky reefs, walls, caves, and seagrass meadows. Divers and snorkellers can expect depths ranging from 7 to 10 metres, with an average of 8 metres. Visibility typically spans 10 to 30 metres, though divers should remain aware of boat traffic in the area. Entry is possible from both shore and boat. The site supports night diving, with typical dives lasting around 30 minutes. Water temperatures fluctuate between 18C and 27C throughout the year.

Small Reef and Three Tunnels is a boat-accessible site located in the Gemiler Island area. The reef top sits at 15 metres, with a wall dropping to 30 metres. The site features three distinct tunnels formed by wall fractures, located at depths of 20 to 30 metres. Divers should note the top tunnel is narrow. The topography includes rocky outcrops and a cement wreck located halfway back toward the bay. Conditions are generally mild with visibility ranging from 15 to 40 metres. Species recorded around this area include Indian Lionfish, pufferfish, Turkish Wrasse, European Parrotfish, wrasses, lizardfish, fireworms, white seabream, crabs, snails, and sea cucumbers.