The Bryozoan Rhynchozoon larreyi (Audouin, 1826)–A Successful Competitor in Coral Reef Communities of the Red Sea

Abstract. Rhynchozoon larreyi (A udouin , 1826) is a successful competitor for space in sessile reef communities at Port Sudan and Eilat (Red Sea). At these localities it has always been found in association with Zanclea sp. The relationship between the two species is regarded as mutualistic. The hydroid benefits through association with a successful spatial competitor; the bryozoan gains advantage through protection of its surface from predation and fouling. Morphological modification of the bryozoan colony in response to this association leads to a highly organized reticulate surface pattern, which provides both symbionts with access to feeding currents.