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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.
Tube-dwelling anemones or cerianthids look very similar to sea anemones, but belong to an entirely different subclass of anthozoans. They are solitary, living buried in soft sediments. Tube anemones live and can withdraw into tubes, which are made of a fibrous material, which is made from secreted mucus and threads of nematocyst-like organelles ...
One example is the relationship between sea anemones and anemone fish in the family Pomacentridae: the anemones provide the fish with protection from predators (which cannot tolerate the stings of the anemone's tentacles) and the fish defend the anemones against butterflyfish (family Chaetodontidae), which eat anemones.
Now, in a new study published in the journal Science Advances, researchers from the University of Vienna have possibly identified small, multi-potent cells in scarlet sea anemones that basically ...
Invertebrate sea life includes the following groups, some of which are phyla: The 49th plate from Ernst Haeckel's Kunstformen der Natur, 1904, showing various sea anemones classified as Actiniae, in the Cnidaria phylum "A variety of marine worms": plate from Das Meer by M.J. Schleiden (1804–1881) Acoela, among the most primitive bilateral ...
Aiptasia is a widely distributed genus of temperate and tropical sea anemones of benthic lifestyle typically found living on mangrove roots and hard substrates. These anemones, as well as many other cnidarian species, often contain symbiotic dinoflagellate unicellular algae of the genus Symbiodinium living inside nutritive cells.
The Enthemonae is a suborder of sea anemones in the order Actiniaria.It comprises those sea anemones with typical arrangement of mesenteries for actiniarians. [1]The Enthemonae is any member of the invertebrate suborder characterised by soft bodied, marine animals that look like flowers which primarily attach to hard or rigid surfaces, such as coral or rocks.
Aggregating anemones have specialized tentacles called acrorhagi that are used solely to deter other colonies from encroaching on their space. When a polyp makes physical contact with a non-clonemate, it extends the acrorhagi to attack the competing anemone with stinging cells called nematocytes .