A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result...

A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate...

The Great Barrier Reef is the world's largest coral reef system, composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres...

Look up reefing in Wiktionary, the free dictionary. Reefing reduces the area of a sail, usually by folding or rolling one edge of the canvas in on itself...

The reef knot, or square knot, is an ancient and simple binding knot used to secure a rope or line around an object. It is sometimes also referred to as...

scarp in South Africa Great Barrier Reef or "The Reef", the planet's largest coral reef The Reef or The Reefs, a former mansion in Newport, Rhode Island, in...

Look up reef in Wiktionary, the free dictionary. A reef is a bar of rock, sand, coral or similar material, lying beneath the surface of water. Reef may also...

The reef triggerfish (Rhinecanthus rectangulus), also known as the rectangular triggerfish, wedgetail triggerfish or by its Hawaiian name humuhumunukunukuāpuaʻa...

island subsides, the coral fringing reef becomes a barrier reef that is detached from the island. Eventually, reef and the small coral islets on top of...

A reef aquarium or reef tank is a marine aquarium that prominently displays live corals and other marine invertebrates as well as fish that play a role...

A reef knoll is a landform that comprises an immense pile of calcareous material that had previously accumulated on an ancient sea floor. Reef knolls are...

The Rainbow Reef is a reef in the Somosomo Strait between the Fijian islands of Taveuni and Vanua Levu. It is one of the most famous dive sites in the...

The blacktip reef shark (Carcharhinus melanopterus) is a species of requiem shark, in the family Carcharhinidae, which can be easily identified by the...

outer edge of the Great Barrier Reef and includes Heralds Beacon Island, Osprey Reef, the Willis Group and fifteen other reef/island groups. Cato Island is...

Osborne Reef is an artificial reef off the coast of Fort Lauderdale, Florida at 26°06′27″N 80°03′54″W / 26.10748°N 80.06493°W / 26.10748; -80.06493...

An artificial reef (AR) is a human-created freshwater or marine benthic structure. Typically built in areas with a generally featureless bottom to promote...

Subi Reef, also known as Xu Bi Reef (Vietnamese: Đá Xu Bi), Zamora Reef (Filipino: Bahura ng Zamora, lit. 'Reef of Zamora'), or Zhubi Reef (Chinese: 渚碧礁;...

The whitetip reef shark (Triaenodon obesus) is a species of requiem shark, in the family Carcharhinidae, and the only member of its genus. A small shark...

Reef are an English rock band from Glastonbury whose members include Gary Stringer on vocals, Amy Newton on guitar, Jack Bessant on bass, and Luke Bullen...

Cherbaniani Reef, also known as Beleapani Reef (Malayalam: Valiyapanniyam), is a coral atoll belonging to the Amindivi Subgroup of islands of the Union...

The grey reef shark or gray reef shark (Carcharhinus amblyrhynchos, sometimes misspelled amblyrhynchus or amblyrhinchos) is a species of requiem shark...

Kingman Reef (/ˈkɪŋmən/) is a largely submerged, uninhabited, triangle-shaped reef, geologically an atoll, 9.0 nmi (20 km) east-west and 4.5 nmi (8 km)...

Donovan's Reef is a 1963 American adventure comedy film starring John Wayne and Lee Marvin. It was directed by John Ford and filmed in Kauai, Hawaii, but...

Reef, which includes West, Middle and East Islands, in addition to two lagoons, as well as Cartier Reef, which includes Cartier Island. Ashmore Reef covers...

Mischief Reef, also known as Meiji Reef (Chinese: 美濟礁/美济礁; pinyin: Měijì Jiāo), Vành Khăn Reef (Vietnamese: Đá Vành Khăn), or Panganiban Reef (Filipino:...

Lasseter's Reef refers to the purported discovery, announced by Harold Bell Lasseter in 1929 and 1930, of a fabulously rich gold deposit in a remote and...

The Reef is a 2010 Australian survival horror film, written, directed and produced by Andrew Traucki in his second feature film (the first being Black...

Dolphins Reef advertises the following activities that they claim focus mainly on dolphins and conserving them -Swimming with dolphins, diving lessons...

Nelscott Reef is an ocean reef near Lincoln City, Oregon, United States, that creates a reef break (a surf-break created by the presence of a rock or...

species of reef-associated sharks which are known by the common name reef sharks. In the Indian and Pacific Oceans: Blacktip reef shark Grey reef shark Whitetip...