Description: Medium sized species similar to G.gracilis.

Habitat: Generally sublittoral often on mobile sbustrates to 15 m.

Distribution: British Isles: Ireland, England and Scotland. Europe: Mediterranean, France, Netherlands, Helgoland and Denmark. Further afield: Namibia.

Similar Species: Gracilaria gracilis

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

iNaturalist: Gracilariopsis longissima at iNaturalist World Species Observations database.

WoRMS: Gracilariopsis longissima at World Register of Marine Species. Accepted name: Gracilariopsis longissima (S.G.Gmelin) Steentoft, L.M.Irvine & Farnham, 1995. AphiaID: 146960.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Gracilariales; Gracilariaceae; Gracilarioideae; Gracilariopsideae; Gracilariopsis