Ctenactis echinata is a free-living species of solitary disc coral in the family Fungiidae.

It has an axial furrow extending along most of its length with usually a single mouth opening, but occasionally there may be more than one.

The primary septa are thick and heavily toothed with large triangular teeth.

The costae, on the underside of the coral, are poorly defined and have long arborescent or cylindrical spines arranged in radial rows.

It is found on reef flats and slopes and in lagoons to depths of 20 m (66 ft).