http://en.wikipedia.org/wiki/Hymenostome
The hymenostomes are an order of ciliate protozoa. Most are free-living in freshwater, such as the commonly studied genusTetrahymena, but some are parasitic on fish or aquatic invertebrates. Among these is the important species Ichthyopthirius multifiliis, a common cause of death in aquaria and fish farms.
The hymenostomes are an order of ciliate protozoa. Most are free-living in freshwater, such as the commonly studied genusTetrahymena, but some are parasitic on fish or aquatic invertebrates. Among these is the important species Ichthyopthirius multifiliis, a common cause of death in aquaria and fish farms.
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