The main stems and side branches are thin, wavy, and of a pale straw colour.

As in all Sertularella species, the side branches support alternate hydrothecae, one to each internode.

The hydrothecae are bulbous at the base and become narrower towards the rim which has four cusps, and an operculum that consists of four triangular flaps.

A raised tubular structure with four vertically projecting denticles surrounds the aperture.

[3] Reported widely from the Atlantic Ocean and Mediterranean Sea, shallow sublittoral to considerable depths.