Thelenota rubralineata is a species of sea cucumber in the family Stichopodidae, in the phylum Echinodermata, mainly located in the central Indo-Pacific region.

[3] Thelenota rubralineata is found on outer coral reef slopes with large rubble and coarse sand patches near islands 20 meters and deeper.

A short digestive tract, two narrow respiratory trees, and a small circulatory system running parallel to the intestines is also present.

When disturbed, T. rubralineata bends its body in a helical fashion, arranging its mouth close to the anus, and assumes this position for up to 10 minutes or longer, then moves again.

[1][3] Thelenota rubralineata and other species of echinoderms are commonly harvested in the Western Central Pacific region.