Distribution: C. laevis, formerly known as Microciona laevis, seems to thrive on steep surfaces on depths below 25 meters. It is widespread in the North-East Atlantic and can be found along most of the Norwegian coast.
Characteristics: The sponge forms fragile, thin, grey og cream colored, sheets on hard substrate. The surface has obvious channels spreading out from a few larger openings (osculae). The surface between the channels is covered by small pores (ostia).
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(Fættenfjorden -
The Trondheim fjord / 5.21.2010 / 27 meters)