The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
A large (10cm) robust polysiphonous species confined to the subtidal and to deep
exposed-shore rock pools on the extreme lower shore in sheltered habitats. Confined to western and south-western Britain and western Ireland.