Obelia bidentata — Peña Cantero, 2009: 1749, fig. 3g.
Material examined. TAN 0602/420, two stems up to 10 mm high, on S. compressa (NIWA 144251).
Ecology and distribution. Obelia bidentata had been collected at depths between 85 and 117 m (Peña Cantero 2009) off Sturge and Buckle islands, epibiotic on H. incertus and in turn as basibiont for colonies of Filellum sp. and L. longitheca. Present material found at a depth of 103−108 m off Sturge Island, growing on S. compressa.