Animalia > Cnidaria > Hydrozoa

Hydrozoa (hydralike animals, hydroids, and hydrozoans)

Wikipedia Abstract

Hydrozoa (hydrozoans, from ancient Greek ὕδρα, hydra, "sea serpent" and ζῷον, zoon, "animal") are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most living in salt water. The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within this class live in fresh water. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria.
View Wikipedia Record: Hydrozoa

Order

Actinulida (Hydrozoans) (14)
Anthoathecata (1,473)   (6)
Leptothecata (2,370)
Limnomedusae (66)
Narcomedusae (85)
Siphonophorae (218)
Trachymedusae (73)

Family

Genus

Archaeolafoea (2)
Bullatella (2)
Cambrohydra (1)
Cambrostroma (1)
Discophyllum (2)
Eisenackiella (1)
Jillua (1)
Kullingia (1)
Lorenzinites (1)
Palaeacmea (1)
Plumalina (1)
Pontifennia (1)
Roseoporella (1)
Velumbrella (1)

(...) = Species count
(...) = Endangered count
(...) = Invasive count

External References

Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0