A whole bunch of our goldfish have these little bumps on them. The bumps are about the size of...BBs and don't seem to cause any drama for the fish. The comets are from 4"-6" or so and just seem happy as pie, but with bumps.
Any ideas what it is or if it's something I should worry about? Our pond is about 5k gal and well filtered (the water test always comes back with flying colors).