Description: Flat irregular baldes rising from a discoid base to a length of 1 m and 2 - 20 cms broad.

Habitat: Very rare. Epilithic. In the upper sublittoral to 7 m in sheltered areas.

Distribution: In the British Isles, known only from Hampshire and Sussex. Europe: Mediterranean, Portugal and the Netherlands. Further afield: Morocco, Ghana, Angola, South Africa and in the Pacific, probably elsewhere under other names.

Similar Species: Other large foliose species such as Kallymenia, Halymenia and Schizymenia are similar.

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

iNaturalist: Grateloupia doryphora at iNaturalist World Species Observations database.

WoRMS: Grateloupia doryphora at World Register of Marine Species. Accepted name: Grateloupia doryphora (Montagne) M.Howe, 1914. AphiaID: 145247.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Halymeniales; Grateloupiaceae; Grateloupia