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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.
Movement may be a passive drifting with the currents or in the case of sea anemones, may involve creeping along a surface on their base. [ 2 ] Gas exchange and excretion is accomplished by diffusion through the tentacles and internal and external body wall, aided by the movement of fluid being wafted along these surfaces by cilia.
Studies on anemonefish have found that they alter the flow of water around sea anemone tentacles by certain behaviors and movements such as "wedging" and "switching". Aeration of the host anemone tentacles allows for benefits to the metabolism of both partners, mainly by increasing anemone body size and both anemonefish and anemone respiration. [9]
The sea anemones are attached to the ocean floor or submarine canyons by their flexible stems. The anemones vary in size and can reach up to a foot across. How the Tentacles Capture Prey.
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 ...
The giant Caribbean sea anemone is a macrophagous carnivore and feeds upon fish, mussels, shrimp, zooplankton, and sea worms. It will not, however, go near any natural predators, such as red leg hermits, the grey sea slug, or the tompot blenny. The anemone's nematocysts help it to capture food as well as defend against predators.
Adamsia palliata is a species of sea anemone in the family Hormathiidae.It is usually found growing on a gastropod shell inhabited by the hermit crab, Pagurus prideaux. [1] The anemone often completely envelops the shell and because of this it is commonly known as the cloak anemone or the hermit-crab anemone.
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 ]