Description: Thallus filamentous, erect and finely branched to 7 cms long with corticating rhizoidal filaments near the base on the main axis.

Habitat: Common. Epiphytic, epizoic and epilithic from the low littoral to 20 m sublittoral.

Distribution: Records scattered around the coasts of the British Isles from the Shetlands to the Channel Islands. Europe: Portugal, Spain, Netherlands and Norway.

Similar Species: All species of Aglaothamnion and Callithamnion are similar and not easy to identify.

Distribution Map from NBN: Aglaothamnion roseum at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Aglaothamnion roseum at iNaturalist World Species Observations database.

WoRMS: Aglaothamnion roseum at World Register of Marine Species. Accepted name: Gaillona rosea (Roth) Athanasiadis, 2016. AphiaID: 1311384.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Callithamniaceae; Callithamnioideae; Callithamnieae; Aglaothamnion