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Actinia tenebrosa
The Waratah anemone, ''Actinia tenebrosa'' is the most common species of sea anemone found in the waters of eastern Australia, and New Zealand. It is found relatively high on the seashore, in rock pools, and various cracks and shaded surfaces such as under rock overhangs in the intertidal zone.
==Description==
When underwater this sea anemone opens up to display numerous tentacles, arranged in three whorls. Out of water, the tentacles retract and the anemone closes to resemble a dome shaped red, crimson, brown, green or black blob of jelly, about across and high. This species was first described in 1898 by H Farquhar who wrote "Full-grown individuals in situations well exposed to the rays of the sun have a column greenish or brownish black, and the disc and tentacles dusky crimson, while those on the undersides of overhanging stones are reddish brown or crimson, the depth of colour varying according to the amount of light which reaches them." ''Actinia tenebrosa'' is similar in form to the beadlet anemone (''Actinia equina'') of the northern hemisphere. The column has a number of iridescent blue spherules armed with nematocysts.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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