Fethiye Twelve Islands

Fethiye · Muğla Province · Turkey

The Twelve Islands of the Fethiye Gulf form a loose archipelago of pine-covered limestone islets scattered across a turquoise bay on Turkey's Turquoise Coast. Known locally as Yassıca Islands, this area has been a popular boat excursion for decades, but its underwater life remains surprisingly underappreciated compared to the surface tourism. The diving benefits from the archipelago's natural shelter. The islands break up wind-driven chop and currents, creating calm conditions in the channels between them. This makes the area accessible for new divers while offering enough variety for experienced divers. A typical day trip covers two or three island sites, each with distinct character. I dropped alongside the eastern face of one of the larger islands where a rocky reef descends from 5 to 25 metres in a series of ledges and overhangs. Within minutes, I noticed amphora fragments half-buried in sandy patches between rock formations. These ancient vessels, remnants of Lycian and Roman maritime trade, have become part of the reef architecture, colonised by sponges and encrusted with marine growth. A loggerhead turtle appeared from behind a Posidonia meadow, its shell easily a metre across, paddling slowly through sun-dappled shallows. It regarded us with phlegmatic calm, then veered toward deeper water. These turtles are the gulf's most charismatic residents, and the nearby Dalyan nesting beach ensures their continued presence. The reef structures are genuinely rich. Large groupers occupy caves and overhangs, moray eels peer from crevices, and octopuses are abundant in the rocky substrate. Barracuda school in the channels where water movement concentrates plankton. The Posidonia meadows are extensive, sheltering juvenile fish and seahorses. The caves and swim-throughs on several islands provide atmospheric diving without technical complexity. Sunlight filtering through openings creates shifting blue illumination, particularly photogenic during morning hours. The combination of warm water, reliable visibility, ancient artefacts, and charismatic megafauna makes the Twelve Islands one of Turkey's most complete diving areas.