Paper Marbling or Ebru Art is a Turkey art where art is first made on water or viscous liquid and transferred to paper to get an amazing art. We can say that this as 'Art on Water'.
You can know more about this art at Wikipedia. But to know how they do, watch below video. It is taken from AICUSA YouTube Channel.
At 1.35, I haven't recognized what he was drawing, but later I came to know what it was.