''Stichopus horrens'' is a variable, grey to green/black sea cucumber from the Indo-Pacific. It is often variegated with dark patches. It is a medium-sized species with a smooth tegument but large and irregular papillae. The big tubercles and irregular body form give an "irregular, soft and almost repulsive" appearance . Spicules are tables and large "C" bodies . ''S. horrens'' many be found on reefs, below rocks on flats.
Similar species: Synallactida
Uploaded Jul 14, 2018. Captured May 14, 2018 13:02 in Unnamed Road, Batulubang, Lembeh Sel., Kota Bitung, Sulawesi Utara, Indonesia.