Economic Importance for Humans: Positive
Hydrozoans are important parts of many marine food chains, and so directly or indirectly support desirable food sources. Species in two families that have colonies with calcareous exoskeletons (Milleporidae, Stylasteridae) have been harvested commercially, and probably still are. There are now limits on their trade and some are considered endangered (see Conservation Status).
- Schuchert, P. 2009. "The Hydrozoa Directory" (On-line). Accessed July 09, 2009 at http://www.ville-ge.ch/mhng/hydrozoa/hydrozoa-directory.htm.