Osprey Reef Osprey Reef 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 , and covers around . It has a perimeter of . The central lagoon is only deep. The reef sits atop a seamount in deep water. It is an isolated location some from other reefs. The almost vertical reef walls, which rise from a depth of about , are home to a dwarf form of "Nautilus pompilius" that is isolated from other nautilus populations
Tema Reef Tema Reef Tema Reef, also called Tima Reef, is a submerged coral reef in the northern Cook Islands, southeast of Pukapuka. No coral or rock shows above water, but the sea breaks heavily over the reef. The reef measures about , covering a shallow but submerged area of . Legend has it that Tima, an Aitutakian warrior sailed to Nassau, but was chased away by Ngalewu, a chief from Pukapuka. On his return to Aitutaki he passed the reef nearby and named it "Te Toka-O-Tima", the Stone of Tima The reef was sighted by Commodore John Byron on June 21,