| Remarks |
Habitat: Underwater caves and anfractuosities, zones of solid drop shadow by rock overhangs, deep rock faces or not exposed with sunlight species present beyond 10 m, seldom less, and until the greatest depths (Ref. 358). Known from infra- and circalittoral zones (Ref. 85338). Biology: the chalice and the periphery of the oral disc are regularly colonized by the barnacles of the corals (Pyrgoma anglicum), species joining only the corals. Association: symphorism, or colonization is a symphorism; or durable colonization by an organization of the surface of another organization. The yellow coral does not suffer any injury; the barnacles seek doubtless protection that the tentacles irritant of the corals offer to them. It is not rare that the wall of the skeleton of the barnacles is covered by the tissues with the coral: one then any more does not distinguish on the chalice from the madréporaire that one small ball bored from an opening in his end (Ref. 358). |