The following species (possibly) occur in the North Sea, but
only the polyp stage is known, the exact medusal stage of each
of these species is unknown (Hansson, 1998a). ¥ Tubularia bellis
Allman, 1863. Meduse unknown; polyp occurs in the lower
eulittoral and is common in the whole North Sea. ¥ Tubularia
indivisa Linnaeus, 1758. Meduse unknown; the polyp occurs from 0
to at least 280 m depth and is common in the whole North Sea. ¥
Tubularia larynx Ellis and Solander, 1786. Meduse unknown; the
polyp occurs from the lower shore to at least 100 m depth and is
common in the whole North Sea. Detached hydranths were
occasionally found in the neritic plankton of the Dutch
Waddenzee. ¥ Tubularia regalis Boeck, 1860. Meduse unknown;
depth range unknown; concerning the North Sea, the polyp
possibly occurs in the Oslofjorden; in the Atlantic Ocean it is
found in the NE Atlantic, NE Greenland, Shetlands, along the
Norway coast, Spitzbergen, and Nova Zembla.