In Lake Michigan, USA. Photo generously provided by David Barnes, Purdue University.
Cristatella mucedo is a fresh- water species, known from North America and Europe.
Original description: Cristatella mucedo Cuvier, 1798
Cristatella mucedo page at Freshwater Bryozoans in the Netherlands (Michiel van der Waaij).
Alien Life Forms? No - Just Bryozoans - at Connecticut River Home Page.
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