Holothuria (Selenkothuria) bacilla is a species of sea cucumber in the genus Holothuria, subgenus Selenkothuria.

First described by Cherbonnier in 1988, the species is found in the Indian Ocean off the coast of Madagascar.

[1] One source has also recorded the species as being present in the Persian Gulf.

[2] The cucumber is a mobile bottom feeder and lives at a depth of between 5–10 cm.

This article about a sea cucumber is a stub.