RHODOPHYTA : Bangiales : BangiaceaeRED ALGAE

Porphyra linearis Greville


Description: Thallus foliose growing from minute holdfast. Blade monostromatic to 18 cms long and 4 to 6 cms broad.

Habitat: Common. Epilithic on rock, concrete or wood etc, from the upper littoral to above high water.

Distribution: Widespread around the British Isles. Europe: Portugal, Spain, France, Netherlands, Baltic, Norway the Faroes and Iceland. Atlantic coast of North America: Canada, Maine and New Hampshire. Further afield: Azores.

Similar Species: Other species of Porphyra.

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

iNaturalist: Porphyra linearis at iNaturalist World Species Observations database.

WoRMS: Porphyra linearis at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Porphyra linearis. Greville. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZM870. Accessed on 2026-11-01