The pictures do not so much reveal themselves as rise and fall, floating to the surface of perception and sinking back again. (lrb.co.uk)
They will float to the surface of the water once they are cooked. (mitchandmajken.com)
Cook gnocchi in a large pot of boiling salted water, stirring occasionally, until gnocchi float to the surface, about 2 minutes (slightly longer if frozen). (bonappetit.com)