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Sea anemones (/ ə ˈ n ɛ m. ə. n i / ə-NEM-ə-nee) are a group of predatory marine invertebrates constituting the order Actiniaria. Because of their colourful appearance, they are named after the Anemone, a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia.
One anemone larva was able to consume a gonad completely in two days. [4] Thirty-one days after becoming parasitic they had developed into juvenile sea anemones with an adult body plan. At this stage they detached themselves from their hosts and dropped to the sea floor where they started to live independently. [ 2 ]
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.
The animal kingdom contains a vast array of animals capability of remarkable regenerative abilities, but known are quite as adept at this healing task than sea-swelling Cnidarians, such as hydra ...
Gastropods with one or two sea anemone on their shells were found to have greater feeding success and more varied stomach contents than those with either no epibionts, or with three or more. The sea anemones also benefited from the mutualism because of the longer time spent in food-rich areas in the deep sea floor, a place where food resources ...
The anemone helps the fish by giving it protection from predators, which include brittle stars, wrasses, and other damselfish, and the fish helps the anemone by feeding it, increasing oxygenation, and removing waste material from the host. Various hypotheses exist about the fish's ability to live within the anemone without being harmed.
The magnificent sea anemone is widespread throughout the tropical and subtropical waters of the Indo-Pacific area, from the eastern coasts of Africa, the Red Sea included, to Polynesia and from south Japan to Australia and New-Caledonia [2] [3] This anemone likes hard substrates well exposed to light and current from the surface to 20 m deep. [2]
The individual species are generally highly host specific. The sea anemone protects the anemonefish from predators, as well as providing food through the scraps left from the anemone's meals and occasional dead anemone tentacles, and functions as a safe nest site. In return, the anemonefish defends the anemone from its predators and parasites.