Marine environments of Saudi Arabia provide highly differentiated habitats for nesting and foraging marine turtles in the Red Sea and Arabian (Persian) Gulf. The Red Sea was formed by a long, deep rift between the continental plates, with limited shallow areas of seagrass and reef along the coastal margins (Bruckner et al. 2012; Bosworth 2015). In contrast, the Arabian (Persian) Gulf is shallow throughout, with large expanses of seagrass and small areas of reef habitat (Sheppard et al. 2010); it is divided into two basins by peninsular Qatar. Widespread, relatively low-density nesting by green turtles (Chelonia mydas) occurs on many beaches throughout the Red Sea (Gasperetti et al. 1993) including the Saudi Arabian coastal site of Ras Al Baridi (Miller 1989, 2004). A few larger rookeries are found along the Egyptian coast and on some offshore islands (El Sadek et al. 2013; Mancini et al. 2015). The majority of green turtle nesting is concentrated at Zabargad Island (≈200 females, El Sadek et al. 2013) with a smaller concentration (≈50 females) within Wadi Gemal-Hamata National Park (Miller 2004; Hanafy 2012; Mancini et al. 2015). In the Arabian (Persian) Gulf, the offshore islands of Saudi Arabia host the largest nesting aggregation of green turtles (Miller 1989; Pilcher 2000; Miller et al. 2011), with a combined nesting density previously estimated to be approximately a thousand turtles per year (Pilcher 2000). Elsewhere in the Gulf, the distribution of green turtle nesting is uneven and typically low (Gasperetti et al. 1993). Lower density nesting sites occur on islands off Kuwait (Rees et al. 2013) and the United Arab Emirates (Miller et al. 2004; Al Suweidi et al. 2012). Along the Iranian coast in the Gulf of Oman, hawksbill turtles are the most common nesting species, with some nesting by green turtles (Mobaraki 2004; Rezaie-Atagholipour & Barmoodeh 2012). The largest regional green turtle rookery is situated at Ras al Hadd in Oman (Mendonça et al. 2010).