Floaty Goldfish Weird Behavior in General Goldfish Discussion Posted October 3, 2017 My Ranchu and Pearlscale have stopped doing it. They still go to the surface and slurp for a bit, but not nearly as much as before. Not sure what changed, as I've not added or removed anything from the tank. They both sift through the gravel more than before, so maybe they've decided that there's more food to be found under the water than at the surface. Hope your fish recovers at some point too.