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 by David Fenwick.
Tetraselmis
Tetraselmis convolutae (Parke & Manton) R.E.Norris, Hori & Chihara, 1980 - A green alga
Tetraselmis marina (Cienkowski) R.E.Norris, Hori & Chihara, 1980
syn. Prasinocladus marinus - A green alga
Chlorophyceae (Class) > Chlamydomonadales (Order) > Chlorochytriaceae (Family)
Chlorochytrium
Chlorochytrium cohnii E.P.Wright, 1877 - An endophytic
single celled green alga in tubes of the colonial diatom
Berkeleya rutilans
Chlorophyceae (Class) > Chlorocystidales (Order) > Chlorocystidaceae (Family)
Halochlorococcum
Halochlorococcum moorei (N.L.Gardner) Kornmann & Sahling, 1983 - Parasitic green alga on Blidingia minima
Chlorophyceae (Class) > Sphaeropleales (Order) > Microsporaceae (Family)
Microspora
Microspora ficulinae P.J.L.Dangeard, 1932
- Parasitic green algae of sponge Halichondria
Microspora ficulinae P.J.L.Dangeard, 1932
- Parasitic green algae of sponge Suberites
Microspora ficulinae P.J.L.Dangeard, 1932
- Parasitic green algae of sponge Hymeniacidon
Trebouxiophyceae (Class) > Prasiolales (Order) > Prasiolaceae (Family)
Prasiola
Prasiola calophylla (Carmichael ex Greville) Kützing, 1845
- A terrestrial algae that is often found in maritime areas
Prasiola stipitata Suhr ex Jessen, 1848
- A Green Guano Weed
Ulvophyceae (Class) > Bryopsidales (Order) > Bryopsidaceae (Family)
Bryopsis
Bryopsis hypnoides J.V.Lamouroux, 1809
- Variously Branched Mossy Feather Weed
Bryopsis plumosa (Hudson) C.Agardh, 1823
- Evenly Branched Mossy Feather Weed
Caulerpa
Caulerpa taxifolia (M.Vahl) C.Agardh, 1817
- Comb Seaweed, Green Sea Palm and Killer Algae
(Non-native highly invasive HORIZON species)
Caulerpa racemosa (Forsskål) J.Agardh, 1873
- Sea Grapes
(Non-native highly invasive HORIZON species)
Ulvophyceae (Class) > Bryopsidales (Order) > Codiaceae (Family)
Codium
Codium adhaerens C.Agardh, 1822 - A green seaweed
Codium fragile subsp. fragile (Suringar) Hariot, 1889
- Green Sea Fingers (non-native species)
Codium tomentosum Stackhouse, 1797 - Velvet Horn
Codium vermilara (Olivi) Delle Chiaje, 1829
- A green seaweed
Ulvophyceae (Class) > Bryopsidales (Order) > Derbesiaceae (Family)
Derbesia
Derbesia marina (Lyngbye) Solier, 1846
- Silky Thread Weed
Ulvophyceae (Class) > Bryopsidales (Order) > Ostreobiaceae (Family)
Ostreobium
Ostreobium quekettii Bornet & Flahault, 1889
- A green boring algae
Ulvophyceae (Class) > Cladophorales (Order) > Anadyomenaceae (Family)
Anadyomene
Anadyomene stellata (Wulfen) C.Agardh, 1823
- Common Sea Kale (non-native species)
Ulvophyceae (Class) > Cladophorales (Order) > Cladophoraceae (Family)
Chaetomorpha
Chaetomorpha linum (O.F.Müller) Kützing, 1845
- Flax Brick Weed
Chaetomorpha melagonium (F.Weber & Mohr) Kützing, 1845
- Glaucous Brick Weed
Chaetomorpha species Chyandour, Penzance, 21.05.15
- A Brick Weed
Cladophora
Cladophora albida (Nees) Kutzing, 1843
- Pale Green Branched Weed
Cladophora pellucida (Hudson) Kützing, 1843
- Pellucid Green Branched Weed
Cladophora rupestris (Linnaeus) Kützing, 1843
- Common Green Branched Weed or Rock Cladophora
Cladophora sericea (Hudson) Kützing, 1843
- Silky Green Branched Weed
Cladophora species (1) - A Green Branched Weed
Cladophora species (2) - A Green Branched Weed
Cladophora species (3) - A Green Branched Weed
Rhizoclonium
Rhizoclonium riparium (Roth) Harvey, 1849
- Rooting Green Thread Weed
Ulvophyceae (Class) > Ulotrichales (Order) > Gomontiaceae (Family)
Monostroma
Monostroma grevillei (Thuret) Wittrock, 1866
- A Green seaweed
Ulvophyceae (Class) > Ulotrichales (Order) > Ulotrichaceae (Family)
Spongomorpha
Spongomorpha aeruginosa (Linnaeus) Hoek, 1963
- Spongy Weed
Spongomorpha aeruginosa (Linnaeus) Hoek, 1963
Chlorochytrium inclusum sporophyte phase
- Spongy Weed
Spongomorpha arcta (Dillwyn) Kützing, 1849
- Green Tarantula Weed or Dillwyn's Spongy Weed
Ulothrix
Ulothrix flacca (Dillwyn) Thuret, 1863
- Flabby Shaggy Hair Weed
Ulothrix speciosa (Carmichael) Kützing, 1849
- Showy Shaggy Hair Weed
Ulvophyceae (Class) > Ulvales (Order) > Kornmanniaceae (Family)
Blidingia
Blidingia minima (Nägeli ex Kützing) Kylin, 1947
- Lesser Grass Kelp or Squashed Gutweed
Tellamia
Tellamia contorta Batters, 1895 - A Green microalgae
Ulvophyceae (Class) > Ulvales (Order) > Ulvaceae (Family)
Percursaria
Percursaria percursa (C.Agardh) Rosenvinge, 1893 ?
- A Green algae
Ulva
Ulva clathrata (Roth) C.Agardh, 1811 - Spiky Tendrils
Ulva compressa Linnaeus, 1753 - Thread or Tape Weed
Ulva flexuosa Wulfen, 1803 - Thread or Tape Weed
Ulva intestinalis Linnaeus, 1753
- Gut Weed
Ulva lactuca Linnaeus, 1753 - Sea Lettuce
Ulva linza Linnaeus, 1753 - Doubled Ribbon Weed
Ulva prolifera O.F.Müller, 1778 - Thread or Tape Weed
Ulva rigida C.Agardh, 1823 ? - A Green seaweed
Ulva sp. bloom - Chyandour Rocks, Penzance 05.08.17.
Ulvophyceae (Class) > Ulvales (Order) >
Ulvellaceae (Family)
Ulvella
Ulvella setchellii P.J.L.Dangeard, 1931 ?
- An epiphyte on Osmundea pinnatifida
Objects that look like Green Seaweed
Swan Droppings / Poo
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
