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upon how the reef lies in relation to the land, if any. Reef types include fringing reefs, barrier reefs, and atolls. A fringing reef is a reef that is attached...

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...

Barrier Reef or "The Reef", the planet's largest coral reef The Reef or The Reefs, a former mansion in Newport, Rhode Island, in what is now Brenton Point...

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...

Santiago Aguerre. In 1984, they moved from Argentina to the San Diego beach community of La Jolla, California, where they began Reef. Their product became...

A fringing reef is one of the three main types of coral reef. It is distinguished from the other main types, barrier reefs and atolls, in that it has either...

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

Coral reef fish are fish which live amongst or in close relation to coral reefs. Coral reefs form complex ecosystems with tremendous biodiversity. Among...

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

humuhumu for short), is one of several species of triggerfish. It is found at reefs in the Indo-Pacific and is the state fish of Hawaii. The triggerfish's teeth...

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...

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)...

'Meiji Reef'), is a low tide elevation (LTE) reef/atoll surrounding a large lagoon in the SE of Dangerous Ground in the east of the Spratly Islands in the...

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...

(Hughes Reef) Hallet Reef Holiday Reef Empire Reef Whitson Reef Ross Reef Sinh Tồn Đông (Grierson Reef/ Sin Cowe East Island) Bamford Reef Tetley Reef unknown...

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...

Scorpion Reef (Spanish: Arrecife Alacranes) is an atoll containing a small group of islets in the Gulf of Mexico, about 125 km (78 mi; 67 NM) off the northern...

The Neptune Memorial Reef is an underwater columbarium in what was conceived by the creator as the world's largest man-made reef (covering over 600,000...