[2] Holothuria hilla is a cylindrical sea cucumber, tapering slightly at the posterior end.

The dorsal surface is covered with longitudinal rows of tube feet modified into thornlike conical papillae with broad bases, sometimes joined in pairs.

The ventral surface is similar in colour but the papillae are ranged in four or five rows and are longer and yellowish.

[2] This species is found in the Red Sea, Persian Gulf and the tropical west and central Indo-Pacific oceans, as far east as Hawaii, and even Panama.

[2] Reproduction is either sexual, when the male and female liberate their gametes into the water column, or asexual, by fission.