Cylinder anemone

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They come in an array of colours, such as white, brown or beige but also purple or bright green.

The cylinder anemone grows a long tube burrowed deep into the sand and will disappear inside it if it senses danger. It measures 30 to 40cm in diameter with two whorls of tentacles of varying lengths. It is a hermaphrodite animal that captures small planktonic organisms by paralysing them. The species is endemic to the Mediterranean where it lives on sandy or muddy bottoms and among Posidonia rhizomes between the surface and 40m deep.