other algal species due to its high tolerance to desiccation. Hormosira is a food source for sea urchins, many small crustaceans, and some juvenile fish. Young crustaceans and molluscs often rely on the dense canopies of Hormosira for niche space, protection from predators, and avoid desiccation at low tide. Hormosira provides a substrate for sessile organisms to attach onto, including sea urchins and a wide range of facultative and obligate algal epiphytes such as Notheia anomala. This is beneficial to many organisms as competition for habitat space is a primary limiting factor in the intertidal environment. Uses Due to the species high iodine content, Tasmanian schoolchildren were once urged to eat a bead a day to keep the goitres away. References External links Neptune's necklace discussed in RNZ Critter of the Week, 31 Jul 2020 Fucales Fucales genera Monotypic brown algae genera