Description: Similar to Dictyota dichotoma, branching irregularly dichotomous but unlike D.dichotoma with few branches usually with rounded tips slightly enlarged. In section the central tissue is of large cells more than one cell thick.

Habitat: Rare. Sublittoral.

Distribution: A southern species with records from the west of Ireland, from Cornwall in England and the Channel Islands. Europe: Mediterranean, Portugal, Atlantic coasts of Spain and France. Further afield: the Canary Islands.

Similar Species: Dictyota dichotoma is distinguishable by the central tissue of large cells being only one cell thick even near the base.

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

iNaturalist: Dictyota spiralis at iNaturalist World Species Observations database.

WoRMS: Dictyota spiralis at World Register of Marine Species. Accepted name: Dictyota dichotoma var. intricata (C.Agardh) Greville, 1830. AphiaID: 381180.

Classification: Biota; Chromista; Harosa; Heterokonta; Ochrophyta; Phaeophyceae; Dictyotophycidae; Dictyotales; Dictyotaceae; Dictyoteae; Dictyota