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Hydrozoa (Hydrozoans)

      Hydrozoa (hydrozoans) are a taxonomic class of very small, predatory animals which can be solitary or colonial and which mostly live in saltwater. A few genera within this class live in freshwater. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria.

See: http://en.wikipedia.org/wiki/Hydrozoa

A hydrozoan anatomy
Source: http://animaldiversity.ummz.umich.edu/site/resources/Grzimek_inverts/Hydrozoa/v01_id118_con_hydanat.jpg/view.html


Medusa MM250
Plumalina MŠ6038
Plumalina MŠ6038

In the Virtual Museum there are total 64 samples

Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]