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Sea anemone. Sea anemones (/ əˈnɛm.ə.ni / 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.
Anthozoa is a subphylum 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 basic unit of the adult is the polyp; this consists of a cylindrical column topped by a disc ...
The aggregating anemone (Anthopleura elegantissima), or clonal anemone, is the most abundant species of sea anemone found on rocky, tide swept shores along the Pacific coast of North America. [1] This cnidarian hosts endosymbiotic algae called zooxanthellae that contribute substantially to primary productivity in the intertidal zone . [ 2 ]
The starlet sea anemone has a bulbous basal end and a contracting column that ranges in length from less than 2 to 6 cm (0.8 to 2.4 in). There is a fairly distinct division between the scapus, the main part of the column, and the capitulum, the part just below the crown of tentacles. The outer surface of the column has a loose covering of mucus ...
Binomial name. Actinia equina. (Linnaeus, 1758) The beadlet anemone (Actinia equina) is a common sea anemone found on rocky shores around all coasts of Western Europe and the Mediterranean Sea, and along the Atlantic coast of Africa as far south as South Africa and Australia. Actinia equina can be found both in exposed and sheltered situations.
Sea Anemone A color plate illustration of "Actiniae" from Ernst Haeckel's Kunstformen der Natur of 1899, showing various sea anemones Edit as per request. I scanned this image from the book (the original image is 11 inches tall), and placed it in Actiniidae.
Description. The magnificent sea anemone is characterized by a flared oral disc, which reaches between 20 and 50 cm in diameter, but in some specimens, this can reach 1 m. [1] The oral disc, the base of the tentacles, and the oral orifice have the same color, going from light beige to white. The numerous tentacles exceed 8 cm long.
Located along the eastern coast of the U.S., with a few introduced populations scattered along the western U.S. coast and the southeast coast of Britain, this sea anemone is a member of the sea ...