Codium spinulosum is a species of seaweed in the Codiaceae family. It was first described in 2008 by Yongpil Lee.Lee, Y. (2008). Marine algae of Jeju. pp. [i]-xvi, 1-477 , map. Seoul: Academy Publication
It is endemic to South Korea, where it grows along the coast of Jeju Island from the low tide line to depths of 40 to 60 m.
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