Coral reefs

Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.

ridge of rock in the sea formed by the growth and deposit of coral

French atoll in the Pacific Ocean

series of coral reefs straddling the coast of Belize

protected area

sometimes Minami-Tori-shima or Minami-Torishima, also known as Marcus Island, is an isolated Japanese coral atoll in the northwestern Pacific Ocean, located some southeast of Tokyo and east of the closest Japanese island, South Iwo Jima of the Volcano Islands, and nearly on a straight line between mainland Tokyo and Wake Island, further to the east-southeast. The closest island to Minamitorishima is East Island in the Mariana Islands, which is to the west-southwest.

coral reef in Western Australia

breakdown of relations between the coral host and zooxanthallae, leading to loss of colour

Archipelago in Indonesia

World Heritage site in New Caledonia

thumb|220px|Map of Okinotori

roughly triangular area of the tropical marine waters of Indonesia, Malaysia, Papua New Guinea, Philippines, Solomon Islands and Timor-Leste

Acropora is a genus of small polyp stony coral in the phylum Cnidaria. Some of its species are known as table coral, elkhorn coral, and staghorn coral. Over 149 species are described. Acropora species are some of the major reef corals responsible for building the immense calcium carbonate substructure that supports the thin living skin of a reef.

federal dependency of Venezuela

one of the Andaman Islands

two submerged atolls in the South Pacific Ocean, claimed by Fiji and Tonga

Montipora is a genus of Scleractinian corals in the phylum Cnidaria. Members of the genus Montipora may exhibit many different growth morphologies. With eighty five known species, Montipora is the second most species rich coral genus after Acropora.

archipelago

fish which live amongst or in close relation to coral reefs

reef

Madrepora (Spanish, "mother of pores") is a genus of stony corals, often found forming reefs or islands in tropical locations. The names Madrepore and Madreporaria were formerly applied universally to any stony coral of the family Scleractinia. They reproduce in three separate ways, as discovered by the marine zoologist Anne Thynne (1800–1866). It is commonly known as horn coral. A colony is branched with small polyps in cylindrical cups separated by a perforated coenosteum. Terminal polyps bear six tentacles, while lateral polyps bear twelve tentacles. Madrepora is economically important, sin

Marine invertebrates

Chinese construction of artificial islands in the disputed South China Sea

species of cnidarian

species of cnidarian

form of coral reef

species of Anthozoa

reef in the Gulf of Mexico

protected area in Mexico

species of cnidarian

three atolls in Rennell and Bellona Province, Solomon Islands

species of cnidarian

species of cnidarian

species of coral

Reef building corals

Egyptian coral reef and dive site in the Straits of Gubal in the south of the Gulf of Suez

island in Yucatan, Mexico

large field of undersea sand mounds off the north west coast of Scotland

2017 film by Jeff Orlowski

species of cnidarian

Isopora is a genus of small polyp stony coral in the phylum Cnidaria.

marine ecosystem

biological water filter that uses light to grow algae which removes undesirable chemicals from aquarium water

mountain in Seychelles

2003 humorous short documentary film directed by Roger Gould

island in Milne Bay Province, Papua New Guinea

undersea reef near Røst, Norway

deep-water coral reef off the coast of Norway

northernmost coral reef on Earth, by the Eilat shore

factors which adversely affect tropical coral reefs