Sea Anemones

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Sea Anemones


(Actiniaria), an order of marine Coelenterata from the class of coral polyps (Anthozoa). The sea anemones are solitary polyps and rarely form colonies. The body of the sea anemone is cylindrical (from several mm to 1.5 m across) and sacciform, with a muscular foot by means of which the animal can move slowly. On the upper end of the body there is a mouth surrounded by a crown of feelers. Species which lead an attached, fossorial, and free-swimming life are also known. The anemones are usually brightly colored.

Anemones are widely found; however, the majority dwell in tropical and subtropical waters. In the USSR they are found in the Black Sea, as well as in the northern and far eastern seas. Anemones are predators and feed on various small animals and even small fish; there are also mud-eating forms. The prey is seized by feelers armed with stinging cells, the “shots” of which paralyze or kill the victim. They can cause painful stings to human beings. Certain anemones live symbiotically with hermit crabs and other invertebrates.


Dogel’, V. A. Zoologiia bespozvonochnykh, 5th ed. Moscow, 1959.
Zhizn’ zhivotnykh, vol. 1. Moscow, 1968. Pages 299–306.


References in periodicals archive ?
Heat stress induces different forms of cell death in sea anemones and their endosymbiotic algae depending on temperature and duration.
And while the gut tissue of a sea anemone might not look like a beating heart, it does undergo slow, rhythmic peristaltic waves of contraction, much like the human digestive system.
Generally, sea anemones are ecologically important members of tropical coral reefs, said Cyndy Sol Rodrigo, technical assistant of the Biodiversity Partnership Program of the Department of Environment and Natural Resources in Western Visayas.
Though other sea anemones have been found in Antarctica, the newly discovered species is the first reported to live in ice.
More amazing is the case of the clown fish, which is always put in the same tank with the sea anemone because when it senses danger, it swims to hide itself in sea anemones, which is the only place where it can hide to protect itself.
A sea anemone common in the Caribbean is known by the scientific name Stichodactyla helianthus.
During these visual estimations, each dive slate with a scale bar was held >10 cm from each measured fish, because even though the fish did not desert their host sea anemones during measurements, they actively avoided the dive slates.
Bottom trawling could easily wipe out certain populations of sea anemones, and scientists estimate that it would take over 200 years for the population to recover and return to the area.
There is plenty of family activity on award-winning beaches too, such as looking for crabs, starfish, sea anemones and marine plants.
They discovered a plethora of unidentified sea animals including crabs, starfish, barnacles, sea anemones and an octopus.
AUG 1-SEPT 2: Get up close and personal with creatures from the deep, as hermit crabs, sea anemones and even shark eggs go on show every Monday and Friday from 10am to 4pm at the Rockpool Roadshows at Portsmouth's Spinnaker Tower.