Rosalinda incrustans (Kramp, 1947) is a poorly known, deep-sea capitate hydrozoan whose biology, morphology, and ecological traits have remained largely obscure due to the rarity of collected material and its small, inconspicuous epibiontic habitus. Since its original description, the species has been collected only twice and recorded two additional times with Remotely Operated Vehicles (ROVs), invariably observed as an epibio...