Anthozoa is a class of marine invertebrates which includes sessile cnidarians such as the sea anemones, stony corals, soft corals and sea pens. Adult anthozoans are almost all attached to the seabed, while their larvae can disperse as planktons.

2023年9月18日 · Anthozoans are characterized by their radially symmetric polyp bodies and the possession of stinging cells known as nematocysts. There are over 6,100 known species of anthozoans worldwide, making them an incredibly diverse group of marine invertebrates. Anthozoans can be solitary or colonial.

Anthozoa is a class of marine invertebrates within the phylum Cnidaria that are unique among cnidarians in that they do not do not have a medusa stage in their development.

The class Anthozoa includes all cnidarians that exhibit a polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones, sea pens, and corals, with an estimated number of 6,100 described species.

An example of Anthozoa, are the sea anemones which stay as polyps their whole lives embedded to the sea floor. Eggs and sperm are released into the water and fertilization results in free-swimming larvae, which embed on the sea floor and develop into a polyps.

Anthozoa is the largest class in the phylum Cnidaria, with over 6,000 extant species divided among nine orders and classified in two subclasses. The nine orders are as follows: Subclass Octocorallia (= Alcyonaria) Subclass Hexacorallia (= Zoantharia)

Anthozoans are probably the most famous cnidarians: they include the corals that build great reefs in tropical waters, as well as sea anemones, sea fans, and sea pens. They also have a long and diverse fossil record, extending back at least 550 million years.

Inhabiting all marine and some… Class Anthozoa Exclusively polypoid with biradial symmetry. Oral end a disk with central mouth and hollow tentacles arising at margin and/or on surface. Mouth leads to coelenteron via stomodaeum that has ciliated troughs (siphonoglyphs) for water transport into and out of coelenteron. Coelenteron divided by radial…

An­tho­zoans in­clude sea anemones, a va­ri­ety of corals, sea fans, and sea pens. Sea anemones are car­niv­o­rous polyps that are quite large, rang­ing up to 200mm in length. They tend to be brightly col­ored. Most species live in warm water. They feed on fishes, which are caught by means of the nu­mer­ous ne­ma­to­cysts in their ten­ta­cles.

Anthozoans are exclusively marine, polypoid cnidarians. They include the familiar sea anemones, and other anemone-like groups with skeletons (such as the "stony" scleractinian corals) and without skeletons (such as tube anemones), as well as …