Genus Gastroblasta Keller, 1883

Gastroblasta Keller, 1883: 622;

type species Gastroblasta timida Keller, 1883 by monotypy.

Diagnosis: Medusa when mature with more than one urn-shaped manubrium; up to 20 radial- and as many centripetal canals, some radial canals may be branched; marginal tentacles with bulbs; numerous statocysts, oval gonads developing near the middle of radial canals or also centripetal canals.

Hydroid like in genus Clytia, living embedded in sponges (Gravili et al., 2007).