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Osprey Reef

13°54′29″S 146°36′55″E / 13.90806°S 146.61528°E / -13.90806; 146.61528

Bathymetric map of Osprey Reef, showing its location around 110 kilometres (68 mi) from the northern part of the Great Barrier Reef
Acropora coral garden with giant clam at Raging Horn, Osprey Reef
Osprey Reef from the air, showing nautilus detection sites used in a 1998–2008 study by Dunstan et al.[1]

Osprey Reef is a submerged atoll in the Coral Sea, northeast of Queensland, Australia. It is part of the Northwestern Group of the Coral Sea Islands. Osprey Reef is roughly oval in shape, measuring 25 by 12 kilometres (16 by 7 mi), and covers around 195 square kilometres (75 sq mi). It has a perimeter of 69.5 kilometres (43.2 mi).[2] The central lagoon is only 30 metres (98 ft) deep.[3]

The reef sits atop a seamount in deep water. It is an isolated location some 60 kilometres (37 mi) from other reefs. The almost vertical reef walls, which rise from a depth of about 2,000 metres (6,600 ft), are home to a dwarf form of Nautilus pompilius that is isolated from other nautilus populations by more than 100 kilometres (62 mi).[1][2][4] Schindleria brevipinguis, one of the world's smallest fish, is found in the Osprey Reef lagoon.[5]

The reef has no intertidal or emerged sand cay.[6] The surrounding waters are part of the South Equatorial Current. The reef is protected within the Coral Sea Commonwealth Marine Reserve.[7]

  1. ^ a b Dunstan, A. J.; Ward, P. D.; Marshall, N. J. (2011). Solan, Martin (ed.). "Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia". PLOS ONE. 6 (2): e16312. doi:10.1371/journal.pone.0016312. PMC 3037366. PMID 21347356.
  2. ^ a b Dunstan, A.; Bradshaw, C. J. A.; Marshall, J. (2011). Solan, Martin (ed.). "Nautilus at risk – estimating population size and demography of Nautilus pompilius". PLOS ONE. 6 (2): e16716. doi:10.1371/journal.pone.0016716. PMC 3037370. PMID 21347360.
  3. ^ Osprey Reef. Dive the World.
  4. ^ Dunstan, A. J.; Ward, P. D.; Marshall, N. J. (2011). Solan, Martin (ed.). "Vertical distribution and migration patterns of Nautilus pompilius". PLOS ONE. 6 (2): e16311. doi:10.1371/journal.pone.0016311. PMC 3043052. PMID 21364981.
  5. ^ Watson, W.,; Walker, H.J. (2004). "The world's smallest vertebrate, Schindleria brevipinguis, a new paedomorphic species in the family Schindleriidae (Perciformes: Gobioidei)" (PDF).[permanent dead link] Records of the Australian Museum 56: 139–142.
  6. ^ F. Sarano; M. Plchon. "Morphology And Ecology Of The Deep Fore Reef Slope At Osprey Reef, (Coral Sea)" (PDF). Proceedings of the 6th International Coral Reef Symposium, Australia, 1988, Vol.2. Archived from the original (PDF) on 7 February 2016. Retrieved 7 February 2016.
  7. ^ "Secrets of the Coral Sea revealed". Australian Geographic. 20 January 2016. Retrieved 7 February 2016.
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