Amphinema Haeckel, 1879 (additional source)
Bimeria nutans (Wright, 1859) accepted as Garveia nutans Wright, 1859 (basis of record)
Campanularia spinulosa Bale, 1888 accepted as Obelia spinulosa (Bale, 1888) (basis of record)
Campanularia verticillata (Linnaeus, 1758) accepted as Rhizocaulus verticillatus (Linnaeus, 1758) (basis of record)
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)
Diphasia attenuata (Hincks, 1866) (additional source)
Eudendrium Ehrenberg, 1834 (additional source)
Eudendrium capillare Alder, 1856 (additional source)
Eudendrium rameum (Pallas, 1766) (additional source)
Eudendrium ramosum (Linnaeus, 1758) (additional source)
Eutima indicans (Romanes, 1876) accepted as Eutonina indicans (Romanes, 1876) (basis of record)
Grammaria Stimpson, 1853 (additional source)
Grammaria serpens (Hassall, 1848) accepted as Filellum serpens (Hassall, 1848) (basis of record)
Halecium tenellum Hincks, 1861 (additional source)
Laomedea bicuspidata (Clark, 1875) accepted as Obelia bidentata Clark, 1875 (basis of record)
Laomedea gigantea (Hincks, 1866) accepted as Clytia hemisphaerica (Linnaeus, 1767) (basis of record)
Nemertesia Lamouroux, 1812 (additional source)
Opercularella Hincks, 1868 (additional source)
Perigonimus M. Sars, 1846 accepted as Bougainvillia Lesson, 1830 (basis of record)
Perigonimus repens (Wright, 1858) accepted as Leuckartiara octona (Fleming, 1823) (additional source)
Tubularia larynx Ellis & Solander, 1786 accepted as Ectopleura larynx (Ellis & Solander, 1786) (additional source)
Zanclea Gegenbaur, 1856 (additional source)
Zanclea gemmosa McCrady, 1859 (basis of record)

Belgian Exclusive Economic Zone for Abietinaria abietina (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 Bimeria nutans (Wright, 1859) 
Belgian Exclusive Economic Zone for Campanularia integra MacGillivray, 1842 
Belgian Exclusive Economic Zone for Campanularia johnstoni Alder, 1856 
Belgian Exclusive Economic Zone for Campanularia verticillata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Cerianthus lloydii Gosse, 1859 
Belgian Exclusive Economic Zone for Chrysaora hysoscella (Linnaeus, 1767) 
Belgian Exclusive Economic Zone for Cyanea capillata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Dicoryne conferta (Alder, 1856) 
Belgian Exclusive Economic Zone for Diphasia attenuata (Hincks, 1866) 
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 Eutima indicans (Romanes, 1876) 
Belgian Exclusive Economic Zone for Grammaria serpens (Hassall, 1848) 
Belgian Exclusive Economic Zone for Halecium tenellum Hincks, 1861 
Belgian Exclusive Economic Zone for Hydrallmania falcata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Kirchenpaueria pinnata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Laodicea undulata (Forbes & Goodsir, 1853) 
Belgian Exclusive Economic Zone for Laomedea bicuspidata (Clark, 1875) 
Belgian Exclusive Economic Zone for Laomedea dichotoma (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Laomedea geniculata (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Laomedea gigantea (Hincks, 1866) 
Belgian Exclusive Economic Zone for Laomedea gracilis M. Sars, 1851 
Belgian Exclusive Economic Zone for Laomedea longissima (Pallas, 1766) 
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 Nemertesia ramosa (Lamarck, 1816) 
Belgian Exclusive Economic Zone for Obelia Péron & Lesueur, 1810 
Belgian Exclusive Economic Zone for Pelagia perla (Slabber, 1781) 
Belgian Exclusive Economic Zone for Perigonimus repens (Wright, 1858) 
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 Plumularia setacea (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Rathkea octopunctata (M. Sars, 1835) 
Belgian Exclusive Economic Zone for Sertularella gayi (Lamouroux, 1821) 
Belgian Exclusive Economic Zone for Sertularella polyzonias (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Sertularella rugosa (Linnaeus, 1758) 
Belgian Exclusive Economic Zone for Tubularia indivisa Linnaeus, 1758 
Belgian Exclusive Economic Zone for Tubularia larynx Ellis & Solander, 1786 
Belgian Exclusive Economic Zone for Zanclea gemmosa McCrady, 1859  (inaccurate)
Cap Gris Nez for Diphasia attenuata (Hincks, 1866) 
Cap Gris Nez for Sertularella gayi (Lamouroux, 1821) 
De Panne for Campanularia verticillata (Linnaeus, 1758) 
Nieuwpoort for Campanularia johnstoni Alder, 1856 
Nieuwpoort for Hydrallmania falcata (Linnaeus, 1758) 
Nieuwpoort for Laomedea geniculata (Linnaeus, 1758) 
North Sea for Beroe cucumis Fabricius, 1780 
North Sea for Diphasia attenuata (Hincks, 1866) 
North Sea for Perigonimus repens (Wright, 1858) 
North Sea for Sertularella gayi (Lamouroux, 1821) 
North Sea for Sertularella polyzonias (Linnaeus, 1758) 
Oostende for Laomedea dichotoma (Linnaeus, 1758) 
Oostende for Laomedea longissima (Pallas, 1766) 
Oostende for Metridium senile (Linnaeus, 1761) 
Oostende for Rathkea octopunctata (M. Sars, 1835) 
Sandettie Bank for Sertularella rugosa (Linnaeus, 1758) 
Wenduine for Laomedea bicuspidata (Clark, 1875) 
Westerschelde for Pleurobrachia pileus (O. F. Müller, 1776) 
Westhinder for Cuspidella costata Hincks, 1868 
Westhinder for Nemertesia antennina (Linnaeus, 1758) 
Westhinder for Plumularia setacea (Linnaeus, 1758) 
Westhinder for Sertularella polyzonias (Linnaeus, 1758) 

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]