Summary ²

Hydrozoa (hydrozoans) are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most living in saltwater. 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 freshwater. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria.

Sources and Credits

1. (c) Doug Anderson, some rights reserved (CC BY-NC), http://www.flickr.com/photos/50489948@N00/354779720
2. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Hydrozoa

More Info

• iNaturalistAU taxon page
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Global Biodiversity Information Facility (GBIF)
• World Register of Marine Species

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