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These sea anemones exclusively reside within the shallow waters of the tropical Indo-Pacific area and are in the main family of sea anemones that hosts several varieties of clownfishes. [1] Most sea anemone species are harmless to humans, but at least some Stichodactyla are highly venomous and their sting may cause anaphylactic shock and organ ...
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.
In the Red Sea, Triactis producta is reported to be one of the most venomous of sea anemones. The symptoms of stings to bare skin include pain and swelling. In one reported case, these lasted for several weeks and were accompanied by a pigmented, blistered lesion and prolonged skin sensitivity.
A cnidocyte (also known as a cnidoblast) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida (pl.: cnidae)) that can deliver a sting to other organisms. The presence of this cell defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). Cnidae are used to capture prey and as ...
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
Phyllodiscus is a monotypic genus of sea anemones in the family Aliciidae. The only species is Phyllodiscus semoni, commonly known as the night anemone, which is native to shallow seas in the central Indo-West Pacific, such as Indonesia, the Philippines and southern Japan. It is venomous and can cause a painful, long-lasting sting to humans.
Metridium farcimen is a large sea anemone, occasionally reaching a height of one metre (39 in) when fully extended. [2] More usually it is 50 cm (20 in) or less in height but is very variable in shape. It can retract its tentacles and form a ball up to 25 cm (10 in) in diameter. The column is slender, smooth and studded with acontia.
Phymanthus crucifer, commonly known as rock flower anemone, flower anemone, red beaded anemone [2] [3] or the beaded anemone, [4] is a species of sea anemone in the family Phymanthidae. It has been described as "closely similar" to Heteractis aurora in several ways, commonly exhibiting " tentacles with swollen cross-bars" [ 5 ] bearing large ...