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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 ...
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 (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland, Australia, separated from the coast by a channel 160 kilometres (100 mi) wide in places ...
- 34,870,000 ha (86,200,000 acres)
- 1981 (5th Session)
- Natural: vii, viii, ix, x
- Off the east coast of the Queensland mainland, Australia
Mischief Reef, also known as Panganiban Reef [1] ( Filipino: Bahura ng Panganiban; Vietnamese: Đá Vành Khăn; Mandarin Chinese: 美濟礁/美济礁; pinyin: Měijì Jiāo; lit. '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 South China Sea.
Pacific sea nettles, Chrysaora fuscescens. Cnidaria ( / nɪˈdɛəriə, naɪ -/) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
Contents. Dinoflagellate. The dinoflagellates ( Greek δῖνος dinos "whirling" and Latin flagellum "whip, scourge") are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata [5] and are usually considered protists. Dinoflagellates are mostly marine plankton, but they also are common in freshwater habitats.
- Dinozoa
- Eukaryota
Jellyfish. Spotted jellies swimming in a Tokyo aquarium. Jellyfish, also known as sea jellies, are the medusa -phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are ...
Scientists have conducted morphological and molecular studies to understand how tardigrades relate to other lineages of ecdysozoan animals. Two plausible placements have been proposed: tardigrades are either most closely related to Arthropoda and Onychophora, or to nematodes..
