Column taller than wide, may be up to 8 cm high by 5 cm wide, firm and stiff. Numerous slender tentacles, up to 700, of moderate length present. Small blister-like pores (cinclides) present at the base of the animal, through which long thread-like acontia can be expelled. Base colour cream or buff, blotched and streaked with reddish or greyish brown, tending to form vertical stripes.
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