I was fortunate to be given a dozen Matsuyama Ranchu. This is a Japanese line that was imported in about 2004 by NeoRanchu and kept alive in the breeders circle. They have wonderful backs but tend to have pinched peduncle. I hope with strong selection we can improve them.
This fish is just yawning, I couldn't find any gill/jaw issuse. May have been eating a daphnia.
Same fish from the side.