Hi all, my pond is full of healthy goldfish BUT one fish was found listless and lying on its side just below the pond surface.. When I went to remove from the pond it had sufficient "get-up-and-go" to upright itself and dive. But within a minute it was back again to lying close to surface on its side. I have removed and placed in a shallow tank. Fish now lies at the bottom of the tank (not top) on its side and hardly ever moves. Will right itself for a second or two if it feels frightened by my presence and then returns to lying on its side at the bottom of the tank. Fish initially did seem to be bloated (not excessivley)- pine-coned (not markedly) but these traits seem to have subsided. However fish remains listless on its side. No other features to behold externally - fish looks a picture of health. Any ideas on what this could be and whether any remedial action is feasible/recommended. Many thanks. PS - timeline so far is three days.