APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland.

Red seaweed / algae images (Rhodophyta)
Eurhodophytina (Subdivision) > Bangiophyceae (Class) > Bangiophycidae (Subclass) > Bangiales (Order)

Bangiaceae (Family)

Bangia
Bangia fuscopurpurea (Dillwyn) Lyngbye, 1819
- Velvet Thread Weed

Porphyra
Porphyra dioica J.Brodie & L.M.Irvine, 1997 - Black Laver
Porphyra linearis Greville, 1830 - Winter Laver
Porphyra purpurea (Roth) C.Agardh, 1824? - Purple Laver
Porphyra umbilicalis Kützing, 1843 - Tough Laver

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Ahnfeltiophycidae (Subclass) > Ahnfeltiales (Order)

Ahnfeltiaceae (Family)

Ahnfeltia
Ahnfeltia plicata (Hudson) E.M.Fries, 1836
- Black Scour Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Corallinophycidae (Subclass) > Corallinales (Order)

Corallinaceae (Family) > Corallinoideae (Subfamily)

Corallina
Corallina officinalis Linnaeus, 1758
- Common Coral Weed or Coralline

Corallinaceae (Family) > Corallinoideae (Subfamily) > Corallineae (Tribe)

Ellisolandia
Ellisolandia elongata (J.Ellis & Solander)
K.R.Hind & G.W.Saunders, 2013
syn. Corallina elongata - Elongate Coral Weed

Corallinaceae (Family) > Corallinoideae (Subfamily) > Janieae (Tribe)

Jania
Jania rubens (Linnaeus) J.V.Lamouroux, 1816
- Slender-beaded Coral Weed or Reddish Coral Weed

Jania squamata (Linnaeus) J.H.Kim, Guiry & H.-G.Choi, 2007 - A Coral Weed

Hapalidiaceae (Family) > Choreonematoideae (Subfamily)

Choreonema
Choreonema thuretii (Bornet) F.Schmitz, 1889
- An algal parasite of Jania sp.

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Nemaliophycidae (Subclass) > Acrochaetiales (Order)

Acrochaetiaceae (Family)

Rhodochorton
Rhodochorton purpureum (Lightfoot) Rosenvinge, 1900
- Purple Hair Weed

Rhodochorton purpureum (Lightfoot) Rosenvinge, 1900
- Purple Hair Weed (in sea cave)

Acrochaetioid algae, various images of
members of the acrochaetiaceae

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Nemaliophycidae (Subclass) > Nemaliales (Order)

Liagoraceae (Family)

Nemalion
Nemalion helminthoides (Velley) Batters, 1902
- Threadweed or Sea Noodles

Scinaiaceae (Family)

Scinaia
Scinaia furcellata (Turner) J.Agardh, 1851
- Southern Scinà's Weed

Scinaia interrupta (A.P.de Candolle) M.J.Wynne 1989
- Irregular Scinà's Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Bonnemaisoniales (Order)

Bonnemaisoniaceae (Family)

Asparagopsis
Asparagopsis armata Harvey, 1855 - Harpoon Weed
Asparagopsis armata Harvey, 1855
- Falkenbergia-phase of Harpoon Weed

Bonnemaisonia
Bonnemaisonia asparagoides (Woodward) C.Agardh, 1822
- A red Seaweed

Bonnemaisonia hamifera Hariot, 1891 - Hooked Weed
Bonnemaisonia hamifera Hariot, 1891
- Trailliella-phase of Hooked Weed

Naccariaceae (Family)

Naccaria
Naccaria wiggii (Turner) Endlicher, 1836
- Naccari's Hairy Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Ceramiales (Order)

Callithamniaceae (Family) > Callithamnieae (Tribe)

Aglaothamnion
Aglaothamnion gallicum (Nägeli) Halos ex Ardré, 1970
- A red seaweed

Aglaothamnion hookeri (Dillwyn) Maggs & Hommersand, 1993 - A red seaweed
Aglaothamnion roseum (Roth) Maggs & L'Hardy-Halos, 1993 - A red seaweed
Aglaothamnion tenuissimum (Bonnemaison) Feldmann-Mazoyer, 1941 - A Red seaweed

Callithamnion
Callithamnion tetragonum (Withering) S.F.Gray, 1821
- A red seaweed

Callithamnion tetragonum var. brachiatum
- A distinct form of the above species although now included with it, separated here for convenience

Callithamnion tetricum (Dillwyn) S.F.Gray, 1821
- A red seaweed

Ceramiaceae (Family) > Ceramioideae (Subfamily) > Ceramieae (Tribe)

Ceramium
Ceramium ciliatum (J.Ellis) Ducluzeau, 1806
- A Banded Pincer Weed

Ceramium echionotum J.Agardh, 1844
- Simply Spined Banded Pincer Weed

Ceramium gaditanum (Clemente) Cremades, 1990
- A Banded Pincer Weed

Ceramium shuttleworthianum (Kützing) Rabenhorst, 1847
- A Banded Pincer Weed

Ceramium virgatum Roth, 1797 - A Banded Pincer Weed
Ceramium species - A Banded Pincer Weed

Gayliella
Gayliella flaccida (Harvey ex Kützing) T.O.Cho &
L.J.McIvor, 2008 syn. Ceramium flaccidum
- A red seaweed

Ceramiaceae (Family) > Ceramioideae (Subfamily) > Dohrnielleae (Tribe)

Antithamnionella
Antithamnionella ternifolia (J.D.Hooker & Harvey) Lyle, 1922
- A red seaweed

Ceramiaceae (Family) > Ceramioideae (Subfamily) > Pterothamnieae (Tribe)

Pterothamnion
Pterothamnion crispum (Ducluzeau) Nägeli, 1862
- Whorled Feather Weed

Pterothamnion plumula (J.Ellis) Nägeli, 1855
- Bushy Feather Weed

Dasyaceae (Family) > Dasyoideae (Subfamily)

Dasya
Dasya ocellata (Grateloup) Harvey, 1833
- A red seaweed

Dasya sessilis Yamada, 1928
- A new non-native red algal species for the UK
"species requiring verification"

Dasysiphonia
Dasysiphonia japonica (Yendo) H.-S.Kim, 2012 syn. Heterosiphonia japonica - Siphoned Japan Weed

Dasyaceae (Family) > Heterosiphonioideae (Subfamily)

Heterosiphonia
Heterosiphonia plumosa (J.Ellis) Batters, 1902
- Siphoned Feather Weed

Delesseriaceae (Family) > Delesserioideae (Subfamily) > Apoglosseae (Tribe)

Apoglossum
Apoglossum ruscifolium (Turner) J.Agardh, 1898
- Veined Tongue Weed

Delesseriaceae (Family) > Delesserioideae (Subfamily) > Delesserieae (Tribe)

Delesseria
Delesseria sanguinea (Hudson) J.V.Lamouroux, 1813
- Bloody Sea Dock, Sea Beech, or Ash-leaved Seaweed

Membranoptera
Membranoptera alata (Hudson) Stackhouse, 1809
- Winged Weed

Delesseriaceae (Family) > Delesserioideae (Subfamily) > Hypoglosseae (Tribe)

Hypoglossum
Hypoglossum hypoglossoides (Stackhouse) F.S.Collins & Hervey, 1917 - Under Tongue Weed

Delesseriaceae (Family) > Nitophylloideae (Subfamily) > Nitophylleae (Tribe)

Nitophyllum
Nitophyllum punctatum (Stackhouse) Greville, 1830
- Spotted Scarf Weed

Delesseriaceae (Family) > Phycodryoideae (Subfamily) > Cryptopleureae (Tribe)

Cryptopleura
Cryptopleura ramosa (Hudson) L.Newton, 1931
- Branched Hidden Ribs

Gonimophyllum
Gonimophyllum buffhamii Batters, 1892
- A parasitic red algae

Delesseriaceae (Family) > Phycodryoideae (Subfamily) > Phycodryeae (Tribe)

Phycodrys
Phycodrys rubens (Linnaeus) Batters, 1902 - Sea Oak

Polyneura
Polyneura bonnemaisonii (C.Agardh) Maggs & Hommersand, 1993 - Crimson Veined Weed

Rhodomelaceae (Family)

Boergeseniella
Boergeseniella fruticulosa (Wulfen) Kylin, 1956
- Tufted Shrub Weed

Boergeseniella thuyoides (Harvey) Kylin, 1956
- Tufted Conifer Weed

Choreocolax
Choreocolax polysiphoniae Reinsch, 1875
- A red algae parasitic on Vertebrata lanosa

Rhodomela
Rhodomela confervoides (Hudson) P.C.Silva, 1952
- Straggly Bush Weed

Rhodomelaceae (Family) > Bostrychieae (Tribe)

Bostrychia
Bostrychia scorpioides (Hudson) Montagne, 1842

Rhodomelaceae (Family) > Brongniartelleae (Tribe)

Brongniartella
Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 - Brongniart's Thread Weed

Rhodomelaceae (Family) > Chondrieae (Tribe)

Chondria
Chondria dasyphylla (Woodward) C.Agardh, 1817
- Diamond Cartilage Weed

Rhodomelaceae (Family) > Laurencieae (Tribe)

Laurencia
Laurencia obtusa (Hudson) J.V.Lamouroux, 1813
- Rounded Brittle Fern-weed

Osmundea
Osmundea hybrida (A.P.de Candolle) K.W.Nam, 1994
- False Pepper Dulse

Osmundea oederi (Gunnerus) G.Furnari, 2008
- Brittle Fern-weed

Osmundea osmunda (S.G.Gmelin) K.W.Nam & Maggs, 1994 ? - Royal Fern-weed
Osmundea pinnatifida (Hudson) Stackhouse, 1809
- Pepper Dulse

Osmundea truncata (Kützing) K.W.Nam & Maggs, 1994 ?
- A Fern-weed

Various images of Osmundea

Rhodomelaceae (Family) > Polysiphonieae (Tribe)

Neosiphonia
Neosiphonia harveyi (J.W.Bailey) M.-S.Kim, H.-G.Choi,
Guiry & G.W.Saunders, 2001 - A red seaweed

Polysiphonia
Polysiphonia atlantica Kapraun & J.N.Norris, 1982
- Atlantic Siphon Weed

Polysiphonia brodiei (Dillwyn) Sprengel, 1827
- Brodie's Siphon Weed

Polysiphonia denudata (Dillwyn) Greville ex Harvey, 1833
- Wide-branched Siphon Weed

Polysiphonia elongata (Hudson) Sprengel, 1827
- Elongate Siphon Weed

Polysiphonia nigra (Hudson) Batters, 1902
- Twisted Siphon Weed

Vertebrata
Vertebrata lanosa (Linnaeus) T.A.Christensen, 1967
syn. Polysiphonia lanosa - Many Tubed Gable Weed

Rhodomelaceae (Family) > Pterosiphonieae (Tribe)

Pterosiphonia
Pterosiphonia complanata (Clemente) Falkenberg, 1897
- Flat Winged Weed

Pterosiphonia parasitica (Hudson) Falkenberg, 1901
- Parasitic Winged Weed

Pterosiphonia pinnulata (Kützing) Maggs & Hommersand 1993 - A Winged Weed (non-native species)

Wrangeliaceae (Family) > Compsothamnieae (Tribe)

Compsothamnion
Compsothamnion gracillimum De Toni, 1903
- Most Graceful Elegant Small Bush Weed ?

Wrangeliaceae (Family) > Griffithsieae (Tribe)

Anotrichium
Anotrichium furcellatum (J.Agardh) Baldock, 1976
- Forked Twig Weed (probably non-native)

Griffithsia
Griffithsia corallinoides (Linnaeus) Trevisan, 1845
- Mrs Griffith's Coral Weed

Halurus
Halurus equisetifolius (Lightfoot) Kützing, 1843
- Sea Horsetail, Sea Tail or Sea Mare’s-tail

Halurus flosculosus (J.Ellis) Maggs & Hommersand, 1993
- Mrs. Griffiths's Little Flower

Wrangeliaceae (Family) > Monosporeae (Tribe)

Monosporus
Monosporus pedicellatus (Smith) Solier, 1845
- A red seaweed

Wrangeliaceae (Family) > Ptiloteae (Tribe)

Plumaria
Plumaria plumosa (Hudson) Kuntze, 1891
- Soft Feather Weed

Wrangeliaceae (Family) > Spermothamnieae (Tribe)

Spermothamnion
Spermothamnion repens (Dillwyn) Rosenvinge, 1924
- A red seaweed

Wrangeliaceae (Family) > Sphondylothamnieae (Tribe)

Sphondylothamnion
Sphondylothamnion multifidum (Hudson) Nägeli, 1862
- Whorled Bush Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Colaconematales (Order)

Colaconemataceae (Family)

Colaconema
Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton, 1991 - A red seaweed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Gelidiales (Order)

Gelidiaceae (Family)

Gelidium
Gelidium pulchellum (Turner) Kützing, 1868
- Beautiful Straggle Weed

Gelidium pusillum (Stackhouse) Le Jolis, 1863
- A Straggle Weed

Gelidium spinosum (S.G.Gmelin) P.C.Silva, 1996
- Spiny Straggle Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Gigartinales (Order)

Caulacanthaceae (Family)

Catenella
Catenella caespitosa (Withering) L.M.Irvine, 1976
- Creeping Chain Weed

Caulacanthus
Caulacanthus ustulatus (Mertens ex Turner) Kützing, 1843
- Pom-pom Weed

Cystocloniaceae (Family)

Calliblepharis
Calliblepharis ciliata (Hudson) Kützing, 1843
- Beautiful Eyelash or Red Fringed Weed

Calliblepharis jubata (Goodenough & Woodward) Kützing, 1843 - False Eyelash Weed

Cystoclonium
Cystoclonium purpureum (Hudson) Batters, 1902
- Purple Claw Weed

Rhodophyllis
Rhodophyllis divaricata (Stackhouse) Papenfuss, 1950
- Leafy Rose Weed

Dumontiaceae (Family)

Dilsea
Dilsea carnosa (Schmidel) Kuntze, 1898
- Red Rags or False Dulse

Dumontia
Dumontia contorta (S.G.Gmelin) Ruprecht, 1850
- Dumont's Tubular Weed (syn. D. incrassata)

Pikea
Pikea californica Harvey, 1853
- Captain Pike's Weed (non-native species)

Furcellariaceae (Family)

Furcellaria
Furcellaria lumbricalis (Hudson) J.V.Lamouroux, 1813
- Clawed Fork Weed or Black Carrageen

Gigartinaceae (Family)

Chondracanthus
Chondracanthus acicularis (Roth) Fredericq, 1993
- Creephorn

Chondrus
Chondrus crispus Stackhouse, 1797
- Carragheen or Irish Moss

Gigartina
Gigartina pistillata (S.G.Gmelin) Stackhouse, 1809
- Pestle Weed

Kallymeniaceae (Family)

Callocolax
Callocolax neglectus F.Schmitz ex Batters, 1895
- A red algal parasite of Callophyllis laciniata

Callophyllis
Callophyllis laciniata (Hudson) Kützing, 1843
- Beautiful Fan Weed

Kallymenia
Kallymenia reniformis (Turner) J.Agardh, 1842
- Beautiful Kidney Weed

Phyllophoraceae (Family)

Gymnogongrus
Gymnogongrus crenulatus (Turner) J.Agardh, 1851
- Norwegian Fan Weed

Mastocarpus
Mastocarpus stellatus (Stackhouse) Guiry, 1984
- False Irish Moss or Agar Weed

Phyllophora
Phyllophora pseudoceranoides (S.G.Gmelin) Newroth & A.R.A.Taylor, 1971 - Stalked Leaf Bearer

Schottera
Schottera nicaeensis (J.V. Lamouroux ex Duby)
Guiry & Hollenberg, 1975 - Shaded Weed

Stenogramma
Stenogramma interruptum (C.Agardh) Montagne, 1846
- Papery Fan Weed

Polyidaceae (Family)

Polyides
Polyides rotunda (Hudson) Gaillon, 1828
- Discoid Fork Weed or Goat Tang

Schmiziellaceae (Family)

Schmitziella
Schmitziella endophloea Bornet & Batters, 1892
- An endophytic algae of Cladophora pellucida

Solieriaceae (Family)

Solieria
Solieria chordalis (C.Agardh) J.Agardh, 1842
- Solier's Red String Weed

Sphaerococcaceae (Family)

Sphaerococcus
Sphaerococcus coronopifolius Stackhouse, 1797
- Berry Wart Cress

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Gracilariales (Order)

Gracilariaceae (Family)

Gracilaria
Gracilaria gracilis (Stackhouse) M.Steentoft, L.M.Irvine & W.F.Farnham, 1995 - Slender Wart Weed
Gracilaria multipartita (Clemente) Harvey, 1846
- Cleaved Wart Weed

Pterocladiophilaceae (Family)

Holmsella
Holmsella pachyderma (Reinsch) Sturch, 1926
- Parasitic on Slender Wart Weed, Gracilaria gracilis

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Halymeniales (Order)

Halymeniaceae (Family)

Grateloupia
Grateloupia filicina (J.V.Lamouroux) C.Agardh, 1822
- Grateloup's Fern Weed

Grateloupia turuturu Yamada, 1941
- Devil's Tongue Weed (Non-native species)

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Nemastomatales (Order)

Schizymeniaceae (Family)

Schizymenia
Schizymenia dubyi (Chauvin ex Duby) J.Agardh, 1851
- Starry Liver Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Palmariales (Order)

Palmariaceae (Family)

Palmaria
Palmaria palmata (Linnaeus) Weber & Mohr, 1805
- Dulse, Dillisk or Crannach

Rhodophysemataceae (Family)

Rhodophysema
Rhodophysema georgei Batters, 1900
- An epiphyte of Eel-grass, Zostera marina

Rhodothamniellaceae (Family)

Rhodothamniella
Rhodothamniella floridula (Dillwyn) Feldmann, 1978
- Sand Binder

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Plocamiales (Order)

Plocamiaceae (Family)

Plocamium
Plocamium cartilagineum (Linnaeus) P.S.Dixon, 1967
- Cocks Comb or Red Comb Weed

Plocamium nanum G.W.Saunders & K.V.Lehmkuhl, 2005 ?
- Wiry Cock's Comb

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Rhodymeniales (Order)

Champiaceae (Family)

Champia
Champia parvula (C.Agardh) Harvey, 1853
- Little Fat Sausage Weed

Chylocladia
Chylocladia verticillata (Lightfoot) Bliding, 1928
- Juicy Whorl Weed

Gastroclonium
Gastroclonium ovatum (Hudson) Papenfuss, 1944
- Red Grape Weed or Egg-shaped Juice Branch Weed

Lomentariaceae (Family)

Lomentaria
Lomentaria articulata (Hudson) Lyngbye, 1819
- Bunny's Ears, Bunny-eared Bead-weed or Jointed Pod Weed

Lomentaria clavellosa (Lightfoot ex Turner) Gaillon, 1828
- Club Bead-weed or Feathery Tube Weed

Lomentaria orcadensis (Harvey) F.S.Collins, 1937
- Orkney Bean-weed or Orkney Weed

Eurhodophytina (Subdivision) > Florideophyceae (Class) > Rhodymeniophycidae (Subclass) > Rhodymeniales (Order)

Rhodymeniaceae (Family)

Chrysymenia
Chrysymenia wrightii (Harvey) Yamada, 1932
- Wright's Golden Membrane Weed (non-native species)

Rhodymenia
Rhodymenia pseudopalmata (J.V.Lamouroux)
P.C.Silva, 1952 - Rosy Fan Weed

Rhodymeniocolax
Rhodymeniocolax Setchell, 1923
- A red algae parasitic of Rhodymenia sp.

Many thanks to Professor Michael Guiry for his help in identifying some of the seaweeds featured on this page.
Michael Guiry's Seaweed Website

Other people have also provided advice about the algae on this page and numerous reference books have been used.

These include -
Seaweeds of Britain and Ireland (Seasearch) by Francis Bunker, Christine Maggs, Juliet Brodie and Anne Bunker. Published by Wild Nature Press

Volumes of Seaweeds of the British Isles by the Natural History Museum

Seaweeds by W. Braune and M. D. Guiry

Red Seaweed and Red Algae Images UK Rhodophyta