Campanulariidae

Obelia is a genus of hydrozoans, a class of mainly marine and some freshwater animal species that have both polyp and medusa stages in their life cycle. Hydrozoa belongs to the phylum Cnidaria, which are aquatic (mainly marine) organisms that are relatively simple in structure with a diameter around 1mm. There are currently 120 known species, with more to be discovered. These species are grouped into three broad categories: O. bidentata, O. dichotoma, and O. geniculata. O. longissima was later accepted as a legitimate species, but taxonomy regarding the entire genus is debated over.

Campanulariidae is a family of hydrozoans in the phylum Cnidaria, or stinging-celled animals. Campanulariidae is composed entirely of hydoids, a Greek term meaning "water animals" applied to the plant-like polyp colonies of the class Hydrozoa. All species of the Campanulariidae are aquatic in habitat, primarily inhabiting coastal regions and tidal pools.

Campanularia is a genus of hydrozoans, in the family Campanulariidae.

species of cnidarian

species of cnidarian

species of cnidarian

genus of cnidarians

species of cnidarian

Gonothyraea is a genus of cnidarians belonging to the family Campanulariidae.

Gastroblasta is a genus of cnidarians belonging to the family Campanulariidae.

species of cnidarian

species of cnidarian

Laomedea is a genus of Cnidaria of the family Leptothecata. The genus was described by Lamouroux in 1812.