Anthozoa is a class within the phylum Cnidaria that contains the sea anemones and corals. Unlike other cnidarians, anthozoans do not have a medusa stage in their development. Instead, they release sperm and eggs that form a planula, which attaches to some substrate on which the cnidarian grows. Some anthozoans can also reproduce asexually through budding. Download high resolution version (1024x508, 164 KB) Wikipedia does not have an article with this exact name. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Animals are a major group of organisms, classified as the kingdom Animalia or Meta­zoa. ... Classes Cnidaria (silent c - pronounced // from New Latin cnida, fr. ... Christian Gottfried Ehrenberg (April 19, 1795 – June 27, 1876), German naturalist, zoologist, comparative anatomist and microscopist, was one of the most famous and productive scientists of his time. ... Classes Cnidaria (silent c - pronounced // from New Latin cnida, fr. ... Families Many, see text. ... Subclasses Alcyonaria Zoantharia See text for orders. ... In biology, a medusa (also known as a hydromedusa) is a form of cnidarian in which the body is shortened on its principal axis and broadened, sometimes greatly, in contrast with the hydroid or polyp. ... The signifier sperm can refer to: (mass noun, from Greek sperma = seed) a substance which consists of spermatozoa and which is a component of semen (mass noun) semen itself (informally, count noun with plural sperm or sperms) a single spermatozoon (= sperm cell) sperma ceti (Latin ceti, genitive of cetus = whale... A planula is the free-swimming, flattened, ciliated, bilaterally symmetrical larva of a hydrozoan cnidarian. ... In biochemistry, a substrate is a molecule which is acted upon by an enzyme. ... // General biological meaning - A new organism is formed by the protrusion of part of another organism. ...

All cnidarian species can feed by catching prey with nematocysts, sea anenomies capable of catching fish and corals catching plankton. Some of the species also harbour a type of algae, dinoflagellates called zooxanthellae, in a symbiotic relationship; the reef building corals known as hermatypic corals rely on this symbiotic relationship particularly. The zooxanthellae benefit by using nitrogenous waste and carbon dioxide produced by the host, and the cnidarian gains photosynthetic capability and increased calcium carbonate production in hermatypic corals.^[1] Cnidocytes are prey-capture and defensive cells found on animals of the phylum Cnidaria. ... Photomontage of plankton organisms Plankton are drifting organisms that inhabit the water column of oceans, seas, and bodies of fresh water. ... A seaweed (Laurencia) up close: the branches are multicellular and only about 1 mm thick. ... Classes Dinophyceae Noctiluciphyceae Syndiniophyceae The dinoflagellates are a large group of flagellate protists. ... Zooxanthellae are golden-brown endosymbionts of various marine animals and protozoa. ... Common Clownfish (Amphiprion ocellaris) in their Magnificent Sea Anemone (Heteractis magnifica) home. ... Calcium carbonate is a chemical compound, with chemical formula CaCO3. ...

Anemonies and certain species of coral live in isolation, however most corals form colonies of genetically identical polyps; these polyps closely resemble anemonies in structure, although are generally considerably smaller.

Giant green anemone, Southern California

The two subclasses are divided into a number of orders, those which are extinct are marked with †. Giant Green Anemone (National Marine Sanctuary File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Giant Green Anemone (National Marine Sanctuary File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ...

• Subclass Alcyonaria (= Octocorallia - 8 way symmetry)
  • Alcyonacea (soft corals)
  • Gorgonacea (sea fans, sea feathers)
  • Helioporacea
  • Pennatulacea (sea pens, sea pansies)
  • Stolonifera
  • Telestacea
• Subclass Zoantharia (= Hexacorallia - 6 way symmetry)
  • Ceriantharia (tube-dwelling anemones)
  • Actiniaria (sea anemones)
  • Corallimorpharia
  • Numidiaphyllida †
  • Scleractinia (stony corals)
  • Kilbuchophyllida †
  • Antipatharia (black corals, thorny corals)
  • Zoanthidea
  • Heterocorallida †
  • Rugosa †
  • Heliolitida †
  • Tabulata †
  • Cothoniida †
  • Tabuloconida †
  • Ptychodactiaria

A sea fan is a form of sessile colonial cnidarian, similar to a sea pen or a soft coral, found in tropical and subtropical seawater. ... Families Suborder Sessiliflorae Anthoptilidae Chunellidae Echinoptilidae Funiculinidae Kophobelemnidae Protoptilidae Renillidae Scleroptilidae Stachyptilidae Umbellulidae Veretillidae Suborder Subselliflorae Pennatulidae Pteroeididae Virgulariidae Sea Pens are colonial marine cnidarians belonging to the order Pennatulacea. ... Families Epizoanthidae Parazoanthidae Zoanthidae Zoanthids (order Zoanthidea) are a type of soft coral commonly found in coral reefs all around the world. ... The Tube-dwelling anemone is a close relation of the Sea Anemone. ... Families Many, see text. ... Families Scleractinia, also called stony star corals, are exclusively marine animals; they are very similar to sea anemones but generate a hard skeleton. ... Genera Antipathes Aphanipathes Bathypathes Cirripathes Leiopathes Parantipathes Stichopathes Taxipathes Black coral is a term given to a group of deep water, tree-like tropical coral related to sea anemone. ... Families Epizoanthidae Parazoanthidae Zoanthidae Zoanthids (order Zoanthidea) are a type of soft coral commonly found in coral reefs all around the world. ... Suborders Columnariina† Cystiphyllina† Streptelasmatina† The Rugosa, also called the Tetracoralla, are an extinct order of coral that were abundant in Middle Ordovician to Late Permian seas. ... The tabulate corals, forming the order Tabulata, are an extinct form of coral. ...

References

1. ^ Contribution to the BUFUS Newsletter, Field excursion to Milne Bay Province - Papua New Guinea, Madl and Yip 2000