This sponge is usually white to cream in colour but occasionally pale brown individuals occur. It is flat, like a small hot water bottle and open at one end, it may also be tubular, or composed of contorted flat lobes, with a very short stalk. The surface of the sponge is smooth and clean. This species may be confused with Scypha ciliata which is also whitish in colour and tubular, however in S. ciliata the surface is hairy and there is a crown of spicules around the open end of the tube.
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