Calcareous algae, commonly found in the Atlantic Ocean (from France to Senegal) and in the Mediterranean Sea.

Its thallus has an endophytic base on other calcareous algae, usually Lithophyllum species. The thallus is erect, bushy, and the branching of this alga is dichotomous and regular, with angles of about 90° between branches. The branches’ apices are somewhat swollen and are projected in different directions (on different levels). The colour of the living specimen is light pink, with apices of a lighter colour (due to annular ridges). When dry, the specimen’s colour is similar to the living one.