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.

Hydroid and siphonophore images (Hydrozoa)
Hydroidolina (Subclass)

Anthoathecata (Order) > Aplanulata (Suborder)

Protohydridae (Family)

Protohydra
Protohydra leuckarti Greeff, 1870
- A protohydrid hydrozoan

Freshwater Species

Hydridae (Family)

Hydra
Hydra oligactis Pallas, 1766 - Brown Hydra
Hydra viridissima Pallas, 1766
syn. Chlorohydra viridissima - Green Hydra

Anthoathecata (Order) > Capitata (Suborder)

Candelabridae (Family)

Candelabrum
Candelabrum cocksii (Cocks, 1854)
- A Candelabrum hydroid

Cladonematidae (Family)

Cladonema
Cladonema radiatum Dujardin, 1843
- Root-arm medusa

Eleutheria
Eleutheria dichotoma de Quatrefages, 1842 - A Hydroid

Corynidae (Family)

Coryne
Coryne eximia Allman, 1859 - A Hydroid
Coryne muscoides (Linnaeus, 1761) - A Hydroid
Coryne pusilla Gaertner, 1774 - A Hydroid

Stauridiosarsia
Stauridiosarsia gemmifera (Forbes, 1848) - A Hydroid

Milleporidae (Family)

Millepora
Millepora species - A Fire coral (non-native species)

Porpitidae (Family)

Velella
Velella velella (Linnaeus, 1758)
- By-the-wind-sailor or Sallee man

Tubulariidae (Family)

Ectopleura
Ectopleura dumortierii (Van Beneden, 1844) ?
- A Tubulariid hydroid

Ectopleura larynx (Ellis & Solander, 1786)
- A Tubulariid hydroid

Tubularia
Tubularia indivisa Linnaeus, 1758 - A Tubulariid hydroid

Anthoathecata (Order) > Filifera (Suborder)

Bougainvilliidae (Family)

Bougainvillia
Bougainvillia muscus (Allman, 1863) - A Hydroid

Hydractiniidae (Family)

Clava
Clava multicornis (Forsskål, 1775)
- Club-headed hydroid or Many-horned club

Hydractinia
Hydractinia echinata (Fleming, 1828) - Snail fur

Podocoryna
Podocoryna carnea M. Sars, 1846
- Smoothspined snailfur

Pandeidae (Family)

Amphinema
Amphinema dinema (Péron & Lesueur, 1810) ?
- A pandeid hydrozoan

Leuckartiara
Leuckartiara octona (Fleming, 1823)
- A pandeid hydrozoan

Neoturris
Neoturris pileata (Forsskål, 1775)
- A pandeid hydrozoan

Leptothecata (Order)

Aequoreidae (Family)

Aequorea
Aequorea vitrina Gosse, 1853 - A Crystal jelly

Aglaopheniidae (Family)

Aglaophenia
Aglaophenia pluma (Linnaeus, 1758) - A Sea fir

Campanulariidae (Family)

Campanularia
Campanularia hincksii Alder, 1856
- A campanulariid hydroid

Clytia
Clytia hemisphaerica (Linnaeus, 1767)
- A campanulariid hydroid

Gonothyraea
Gonothyraea loveni (Allman, 1859) ?
- A campanulariid hydroid

Laomedea
Laomedea angulata Hincks, 1861 - Seagrass sea fir
Laomedea flexuosa Alder, 1857 - A campanulariid hydroid

Obelia
Obelia dichotoma (Linnaeus, 1758) ?
- A campanulariid hydroid

Obelia geniculata (Linnaeus, 1758)
- A campanulariid hydroid

Obelia longissima (Pallas, 1766) ?
- A campanulariid hydroid

Orthopyxis
Orthopyxis caliculata (Hincks, 1853)
- A campanulariid hydroid

Campanulinidae (Family)

Opercularella
Opercularella lacerata (Johnston, 1847)
- A campanulinid hydroid

Dipleurosomatidae (Family)

Dipleurosoma
Dipleurosoma typicum Boeck, 1866 ?

Kirchenpaueriidae (Family)

Kirchenpaueria
Kirchenpaueria similis (Hincks, 1861) - A Sea fir

Lafoeidae (Family)

Lafoea
Lafoea dumosa (Fleming, 1820) - A Sea fir

Laodiceidae (Family)

Laodicea
Laodicea undulata (Forbes & Goodsir, 1853) - A Sea fir

Mitrocomidae (Family)

Cosmetira
Cosmetira pilosella Forbes, 1848 - A Leptothecate hydroid

Plumulariidae (Family)

Nemertesia
Nemertesia antennina (Linnaeus, 1758) - Sea beard
Nemertesia ramosa (Lamarck, 1816)

Plumularia
Plumularia setacea (Linnaeus, 1758) - Little sea bristle

Sertulariidae (Family)

Abietinaria
Abietinaria abietina (Linnaeus, 1758) ?
- A sertulariid hydroid

Amphisbetia
Amphisbetia operculata (Linnaeus, 1758)
- A sertulariid hydroid

Diphasia
Diphasia alata (Hincks, 1855) - A sertulariid hydroid

Dynamena
Dynamena pumila (Linnaeus, 1758) - Sea oak coralline

Hydrallmania
Hydrallmania falcata (Linnaeus, 1758)
- Helter skelter hydroid

Sertularella
Sertularella ellisii (Deshayes & Milne Edwards, 1836) ?
- A sertulariid hydroid

Sertularella polyzonias (Linnaeus, 1758)
- A sertulariid hydroid

Sertularella tenella (Alder, 1857) - A sertulariid hydroid

Sertularella species from Long Rock,
Penzance. 07.01.14 - A sertulariid hydroid

Sertularella species from Chimney Rocks,
Penzance. 05.06.16 - A sertulariid hydroid

Sertularia
Sertularia distans (Lamouroux, 1816)
syn. Tridentata distans - A sertulariid hydroid

Thuiaria
Thuiaria articulata (Pallas, 1766)?
- A sertulariid hydroid

Siphonophorae (Order)

Agalmatidae (Family)

Nanomia
Nanomia cara Agassiz, 1865
- A Siphonophore (Newlyn 17.08.15.)

Nanomia cara Agassiz, 1865
- A Siphonophore (Penzance 31.07.15.)

Diphyidae (Family)

Muggiaea
Muggiaea atlantica Cunningham, 1892 ?
- A Diphyid siphonophore

Physaliidae (Family)

Physalia
Physalia physalis (Linnaeus, 1758)
- Portuguese man-of-war

Trachylinae (Subclass)

Trachymedusae (Order)

Geryoniidae (Family)

Liriope
Liriope tetraphylla (Chamisso & Eysenhardt, 1821)
- A geryoniid medusae

Rhopalonematidae (Family)

Aglantha
Aglantha digitale (O. F. Müller, 1776) - Pink helmet ?

Sea Firs (Hydroids) to Identify

Click here for images of Scyphozoa and Staurozoa

Recommended places to visit to see Hydroids -
Much dependant on species but try rockpools on eastern side of Par Beach and Spit Point Par, Cornwall; Carlyon Beach for shells with snail fur; Plymouth Sound and Tamar Estuaries for Sea Firs; and all coasts after summer and winter storms for mass strandings of Velella.

European Names - Sea Fans, Facherkollaren, Zeewaaiers, Gorgones vraies, Abanicos de mar, Cnidarians, Nesseltiere, Neteldieren, Cnidaires, Cnidarios, Cnidari.

Hydroid Hydrozoa sea fir siphonophore images uk