Cladostephus spongiosus (Hudson) C Agardh

Cladostephus spongiosus

Description: Fairly stiffly branched fronds growing from a discoid holdfast, covered with small branchlets arranged in whorls. Maximum length usually about 15 cms.

Habitat: Common. Mainly epilithic in rock pools of the mid-littoral to upper sublittoral.

Distribution: Widespread around the British Isles from the Shetlands to the Channel Islands. Europe: Azores, Portugal, Atlantic coasts of Spain and France, Baltic Sea, Norway, Faroes and Iceland. Atlantic coast of North America: New Hampshire, Massachusetts, Rhode Island, Connecticut and Loong Island. Further afield: west coast of Greenland in Baffin Bay, Canary Islands, Australia and Tasmania.

Key Identification Features:

Distribution Map from NBN: Grid map (fast) : Interactive map (slower, requires login to view records) : National Biodiversity Network mapping facility, data for UK.

 Morton, O. & Picton, B.E. (2015). Cladostephus spongiosus (Hudson) C Agardh. [In] Encyclopedia of Marine Life of Britain and Ireland. Accessed on 2015-12-1

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