Identification key: Hydrozoa

Only in brackish (or fresh) water; perisarc brown; attached gonophores; colony morphology highly variable depending on salinity?

Yes No

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You may use data, pictures,information etc. available ad the site, as long as you refere to the sourse.

The database as a whole is to be cited as follows:

NOBANIS. Available from http://www.NOBANIS.org. Data of access x/x/201x

Front page photo: Trachemys scripta elegans by Henrik Bringsøe