Cidaris nuda is a species of sea urchins of the Family Cidaridae. Their armour is covered with spines. Cidaris nuda was first scientifically described in 1903 by Ole Mortensen.Kroh, A. (2010). Cidaris nuda (Mortensen, 1903). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species.
See also Cidaris blakei Cidaris mabahissae Cidaris rugosa
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