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.

Green seaweed / algae images (Chlorophyta)
Chlorophyceae (Class) > Chlorocystidales (Order) > Chlorocystidaceae (Family)

Halochlorococcum
Halochlorococcum moorei (N.L.Gardner) Kornmann & Sahling, 1983 - Parasitic green alga on Blidingia minima

Chlorodendrophyceae (Class) > Chlorodendrales (Order) > Chlorodendraceae (Family)

Tetraselmis
Tetraselmis marina (Cienkowski) R.E.Norris, Hori & Chihara, 1980 syn. Prasinocladus marinus - A Green alga

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

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

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) > 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 speciosa (Carmichael) Kützing, 1849
- 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.

Umbraulva
Umbraulva dangeardii M.J.Wynne & G. Furnari formerly Umbraulva olivascens (P.J.L. Dangeard) G. Furnari, nom. inval. - A probable non-native green seaweed

Ulvophyceae (Class) > Ulvales (Order) > Ulvellaceae (Family) > Epicladia (Genus) ?

Species unknown, but possibly Epicladia ?
- Epiphytic on Alcyonidium hirsutum

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

Green Seaweed and Green Algae Images UK Chlorophyta