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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. [1] Most coral reefs are built from stony corals, whose polyps cluster in groups. Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and ...
Coral reefs are one of the most well-known marine ecosystems in the world, with the largest being the Great Barrier Reef. These reefs are composed of large coral colonies of a variety of species living together. The corals form multiple symbiotic relationships with the organisms around them. [7]
The name "Anthozoa" comes from the Greek words άνθος (ánthos; "flower") and ζώα (zóa; "animals"), hence ανθόζωα (anthozoa) = "flower animals", a reference to the floral appearance of their perennial polyp stage. [1] Anthozoans are exclusively marine, and include sea anemones, stony corals, soft corals, sea pens, sea fans and ...
The mega coral was spotted during a scientific expedition launched by the National Geographic Pristine Seas program in October to study ocean health in the Solomon Islands.
On Thursday, as a National Geographic expedition was exploring the waters around the Solomon Islands, its members spotted something that looked like a shipwreck underwater. “Just when we think ...
In Alaska, the humpback whales have made it to the feeding grounds. The scene cuts to netted sea animals including tuna, whale sharks, sailfish, sea turtles, and sunfish. Along the way, a fishing boat has a hard time fighting the waves. Then a satellite shows the trash in the ocean. Underwater, tons of trash is destroying a fur seal's home. The ...
A striped surgeonfish amongst the coral on Flynn Reef. There are at least 330 species of ascidians on the reef system with the diameter of 1–10 cm (0.4–4 in). Between 300 and 500 species of bryozoans live on the reef. [54] Four hundred coral species, both hard corals and soft corals inhabit the reef. [46]
Kimbe Bay is the home of more than 860 coral reef fish species. [2] Because of a massive die-off of coral worldwide due to pollution, human activities, and global warming , Kimbe Bay has become increasingly important, since it is seen as one of the last holdouts for coral should the degradation continue.