Description: Thallus in erect tufts to 30 cms long, usually fully corticate.

Habitat: Epiphytic or epilithic in rock pools of the mid to low-littoral and the sublittoral.

Distribution: Generally distributed all around the British Isles. Europe: Netherlands. May be recorded elsewere under the name Ceramium rubrum.

Similar Species: Other corticate species without spines Ceramium: C.echinotum; C.gadiatum; C.secundatum and C. pallidum.

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

iNaturalist: Ceramium nodulosum at iNaturalist World Species Observations database.

WoRMS: Ceramium nodulosum at World Register of Marine Species. Accepted name: Ceramium virgatum J.D.Hooker & Harvey, 1848. AphiaID: 377258.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Ceramiaceae; Ceramioideae; Ceramieae; Ceramium