Cordylophora Allman, 1844 (additional source)
Cordylophora caspia (Pallas, 1771) (additional source)
Cuspidella Hincks, 1866 (additional source)
Cuspidella costata Hincks, 1868 accepted as Laodicea undulata (Forbes & Goodsir, 1853) (additional source)
Dicoryne Allman, 1859 (additional source)
Dicoryne conferta (Alder, 1856) (additional source)
Eudendrium Ehrenberg, 1834 (additional source)
Eudendrium album Nutting, 1898 (additional source)
Eudendrium capillare Alder, 1856 (additional source)
Eudendrium rameum (Pallas, 1766) (additional source)
Eudendrium ramosum (Linnaeus, 1758) (additional source)
Grammaria Stimpson, 1853 (additional source)
Halecium articulosum Clark, 1875 (additional source)
Halecium tenellum Hincks, 1861 (additional source)
Nemertesia Lamouroux, 1812 (additional source)
Opercularella Hincks, 1868 (additional source)
Perigonimus M. Sars, 1846 accepted as Bougainvillia Lesson, 1830 (basis of record)
Tealia Gosse, 1858 (additional source)
Tealia felina (Linnaeus, 1767) accepted as Urticina felina (Linnaeus, 1761) (additional source)
Zanclea Gegenbaur, 1856 (additional source)

Baltic sea for Cordylophora caspia (Pallas, 1771) 
Belgian Coast for Cordylophora caspia (Pallas, 1771)  (origin: alien)
Belgian Exclusive Economic Zone for Abietinaria abietina (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Aequorea vitrina Gosse, 1853 
Belgian Exclusive Economic Zone for Alcyonium digitatum Linnaeus, 1758 
Belgian Exclusive Economic Zone for Aurelia aurita (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Beroe cucumis Fabricius, 1780 
Belgian Exclusive Economic Zone for Bougainvillia ramosa (Van Beneden, 1844) 
Belgian Exclusive Economic Zone for Calycella syringa (Linnaeus, 1767) 
Belgian Exclusive Economic Zone for Campanularia hincksii Alder, 1856 
Belgian Exclusive Economic Zone for Cordylophora Allman, 1844 
Belgian Exclusive Economic Zone for Cordylophora caspia (Pallas, 1771) 
Belgian Exclusive Economic Zone for Coryne sarsi (Lovén, 1836) 
Belgian Exclusive Economic Zone for Cyanea capillata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Dicoryne conferta (Alder, 1856) 
Belgian Exclusive Economic Zone for Diphasia rosacea (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Dynamena pumila (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Ectopleura dumortierii (Van Beneden, 1844) 
Belgian Exclusive Economic Zone for Eudendrium album Nutting, 1898 
Belgian Exclusive Economic Zone for Eudendrium capillare Alder, 1856 
Belgian Exclusive Economic Zone for Eudendrium rameum (Pallas, 1766) 
Belgian Exclusive Economic Zone for Eudendrium ramosum (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Halecium articulosum Clark, 1875 
Belgian Exclusive Economic Zone for Halecium halecium (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Halecium tenellum Hincks, 1861 
Belgian Exclusive Economic Zone for Hybocodon prolifer Agassiz, 1860 
Belgian Exclusive Economic Zone for Hydractinia echinata (Fleming, 1828) 
Belgian Exclusive Economic Zone for Hydrallmania falcata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Laodicea undulata (Forbes & Goodsir, 1853) 
Belgian Exclusive Economic Zone for Laomedea dichotoma (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Laomedea geniculata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Laomedea gracilis M. Sars, 1851 
Belgian Exclusive Economic Zone for Laomedea loveni Allman, 1859 
Belgian Exclusive Economic Zone for Leuckartiara octona (Fleming, 1823) 
Belgian Exclusive Economic Zone for Metridium senile (Linnaeus, 1761) 
Belgian Exclusive Economic Zone for Nemertesia antennina (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Obelia Péron & Lesueur, 1810 
Belgian Exclusive Economic Zone for Opercularella lacerata (Johnston, 1847) 
Belgian Exclusive Economic Zone for Phialidium hemisphaericum (Linnaeus, 1767) 
Belgian Exclusive Economic Zone for Pleurobrachia pileus (O. F. Müller, 1776) 
Belgian Exclusive Economic Zone for Podocoryna carnea M. Sars, 1846 
Belgian Exclusive Economic Zone for Rathkea octopunctata (M. Sars, 1835) 
Belgian Exclusive Economic Zone for Sarsia tubulosa (M. Sars, 1835) 
Belgian Exclusive Economic Zone for Sertularella polyzonias (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Sertularella rugosa (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Sertularia cupressina Linnaeus, 1758 
Belgian Exclusive Economic Zone for Tealia felina (Linnaeus, 1767) 
Belgian Exclusive Economic Zone for Thuiaria thuja (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Trichydra pudica Wright, 1857 
Belgian Exclusive Economic Zone for Tubularia indivisa Linnaeus, 1758 
Belgian Exclusive Economic Zone for Turritopsis nutricula McCrady, 1857  (inaccurate)
Het Zwin for Protohydra leuckarti Greeff, 1870 
Middelkerke for Halecium articulosum Clark, 1875 
Nieuwpoort for Halecium halecium (Linnaeus, 1758) 
Nieuwpoort for Hydrallmania falcata (Linnaeus, 1758) 
Nieuwpoort for Laomedea flexuosa Alder, 1857 
Nieuwpoort for Laomedea geniculata (Linnaeus, 1758) 
Nieuwpoort for Laomedea loveni Allman, 1859 
North Sea for Beroe cucumis Fabricius, 1780 
North Sea for Cordylophora Allman, 1844 
North Sea for Cordylophora caspia (Pallas, 1771) 
North Sea for Ectopleura dumortierii (Van Beneden, 1844) 
North Sea for Hydractinia echinata (Fleming, 1828) 
North Sea for Podocoryna carnea M. Sars, 1846 
North Sea for Sertularella polyzonias (Linnaeus, 1758) 
Oostende for Bougainvillia principis (Steenstrup, 1850) 
Oostende for Laomedea dichotoma (Linnaeus, 1758) 
Oostende for Metridium senile (Linnaeus, 1761) 
Oostende for Rathkea octopunctata (M. Sars, 1835) 
Sandettie Bank for Sertularella rugosa (Linnaeus, 1758) 
Southern Bight for Tealia felina (Linnaeus, 1767) 
Westerschelde for Pleurobrachia pileus (O. F. Müller, 1776) 
Westerschelde for Sertularia cupressina Linnaeus, 1758 
Westhinder for Cuspidella costata Hincks, 1868 
Westhinder for Diphasia rosacea (Linnaeus, 1758) 
Westhinder for Nemertesia antennina (Linnaeus, 1758) 
Westhinder for Sertularella polyzonias (Linnaeus, 1758) 
Westhinder for Thuiaria thuja (Linnaeus, 1758) 
Zeebrugge for Dynamena pumila (Linnaeus, 1758) 
Zeebrugge for Laomedea flexuosa Alder, 1857 

Dutch dekseldragende tandhorenkoraal for Amphisbetia operculata (Linnaeus, 1758)
Dutch fijne zeeden for Abietinaria abietina (Linnaeus, 1758)
Dutch flessenborstel for Thuiaria thuja (Linnaeus, 1758)
Dutch gaafgerande klokpolyp [from synonym] for Campanularia integra MacGillivray, 1842
Dutch gedraaide zeedraad [from synonym] for Laomedea gelatinosa (Pallas, 1766)
Dutch geknoopte zeedraad [from synonym] for Laomedea geniculata (Linnaeus, 1758)
Dutch gekromde zeeborstel for Hydrallmania falcata (Linnaeus, 1758)
Dutch gemeene knodspolyp for Clava multicornis (Forsskål, 1775)
Dutch gemeene zeeanemoon for Actinia equina (Linnaeus, 1758)
Dutch geoorde zeekwal for Aurelia aurita (Linnaeus, 1758)
Dutch geschulpte zeeanemoon for Metridium senile (Linnaeus, 1761)
Dutch gespletene zeedraad [from synonym] for Laomedea dichotoma (Linnaeus, 1758)
Dutch getakte zeespriet for Nemertesia ramosa (Lamarck, 1816)
Dutch granaatroode tandhorenkoraal for Diphasia rosacea (Linnaeus, 1758)
Dutch rimpelige tandhorenkoraal for Sertularella rugosa (Linnaeus, 1758)
Dutch stijne zeeborstel for Plumularia setacea (Linnaeus, 1758)
Dutch vederachtige zeeborstel for Kirchenpaueria pinnata (Linnaeus, 1758)
Dutch zeedraad [from synonym] for Laomedea longissima (Pallas, 1766)
Dutch zeekwal for Cyanea capillata (Linnaeus, 1758)
French actinie plumeuse for Metridium senile (Linnaeus, 1761)
French oeillet de mer for Metridium senile (Linnaeus, 1761)
French poumons de mer for Rhizostoma octopus (Gmelin, 1791)

 Authority

 for Calliactis parasitica (Couch, 1842)

Couch, 1844 [details]

 Authority

 for Halecium articulosum Clark, 1875

Clarke, 1876 [details]

 Authority

 for Halecium tenellum Hincks, 1861

(Hincks, 1868) [details]

 Biology

 for Beroe cucumis Fabricius, 1780

Phosphorescent [details]

 Biology

 for Dynamena pumila (Linnaeus, 1758)

Fluorescent. [details]

 Distribution

 for Aurelia aurita (Linnaeus, 1758)

Cosmopolitan species. [details]

 Distribution

 for Calliactis parasitica (Couch, 1842)

Mediterranean species, reaches its most northern limit somewhere around Belgium. [details]

 Distribution

 for Chrysaora hysoscella (Linnaeus, 1767)

Cosmopolitan species. [details]

 Distribution

 for Cyanea capillata (Linnaeus, 1758)

Cosmopolitan species. [details]

 Distribution

 for Halecium tenellum Hincks, 1861

Cosmopolitan. [details]

 Distribution

 for Laomedea flexuosa Alder, 1857

Boreal and littoral species. [details]

 Distribution

 for Laomedea gelatinosa (Pallas, 1766)

enters deeply into estuaries. [details]

 Distribution

 for Laomedea longissima (Pallas, 1766)

Cosmopolitan species. [details]

 Distribution

 for Plumularia setacea (Linnaeus, 1758)

Cosmopolitan species. [details]

 Introduced species vector dispersal

 for Cordylophora caspia (Pallas, 1771)

in Belgian part of the North Sea: Ships: accidental with ballast water, sea water systems, live wells or other deck ... [details]

 Publication date

 for Amphinema dinema (Péron & Lesueur, 1810)

1809 [details]