Dodatak:Popis žarnjaka, J
Ja uredi
- Janaria
- Jasminisis
- Jasonisis
- Javania
Je uredi
Jeanbouillonia Pagès, Flood & Youngbluth, 2006 uredi
- Jeanbouillonia maserati Pages, Flood & Youngbluth, 2006
Cnidaria → Hydrozoa → Anthoathecata → Jeanbouilloniidae
Porodica Jeanbouilloniidae Pagès, Flood & Youngbluth, 2006 uredi
- Rod: Jeanbouillonia
Ji uredi
†Jiangshanolites Lin and Chow uredi
Cnidaria → Anthozoa → Tabulata
- Jindexiangus
Ju uredi
Jubanyella Fuentes & Pages, 2006 uredi
- Jubanyella plemmyris Fuentes & Pages, 2006
Cnidaria → Hydrozoa → Narcomedusae → Aeginidae
Junceella Valenciennes, 1855 uredi
- Junceella antillarum Toeplitz, 1919
- Junceella delicata Grasshoff, 1999
- Junceella eunicelloides Grasshoff, 1999
- Junceella fragilis (Ridley, 1884)
- Junceella funiculina Duchassaing & Michelotti, 1864
- Junceella juncea (Pallas, 1766)
- Junceella spiralis Hickson, 1904
- Junceella surculus Valenciennes, 1855
- Junceella vetusta (Kölliker, 1865)