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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 .
A typical sea anemone is a sessile polyp attached at the base to the surface beneath it by an adhesive foot, called a basal or pedal disc, with a column-shaped body topped by an oral disc. Most are from 1 to 5 cm (0.4 to 2.0 in) in diameter and 1.5 to 10 cm (0.6 to 3.9 in) in length, but they are inflatable and vary greatly in dimensions.
One fungiid species, Heliofungia actiniformis ("anemone coral"), can be easily mistaken for a sea anemone [actiniarian] because its tentacles remain visible during the day. [6] Fungia spp. have a commensal pipefish, Siokunichthys nigrolineatus. [9] Heliofungia actiniformis provides shelter to some fish species (Gobiidae and Labridae). [10] [11]
Aiptasia is a genus of a symbiotic cnidarian belonging to the class Anthozoa (sea anemones, corals). Aiptasia is a widely distributed genus of temperate and tropical sea anemones of benthic lifestyle typically found living on mangrove roots and hard substrates.
Besides feeding and defense, sea anemone and coral colonies use cnidocytes to sting one another in order to defend or win space. [21] Despite their effectiveness in prey-predator interactions, there is an evolutionary tradeoff as cnidarian venom systems are known to reduce the cnidarian's reproductive fitness and overall growth.
Anthozoan polyps, including the corals and sea anemones, are much more complex due to the development of a tubular stomodaeum leading inward from the mouth and a series of radial partitions called mesenteries. Many of the mesenteries project into the enteric cavity but some extend from the body wall to the central stomodaeum. [citation needed]
Where Does the Venus Flytrap Sea Anemone Live? The Venus flytrap anemone lives deep in the ocean at a range of around 3,300 to 6,600 feet. This is the ocean’s midnight zone, and it’s so far ...
It includes all of the stony corals, most of which are colonial and reef-forming, as well as all sea anemones, and zoanthids, arranged within five extant orders. [2] The hexacorallia are distinguished from another class of Anthozoa, Octocorallia , in having six or fewer axes of symmetry in their body structure; the tentacles are simple and ...