oranda goldfish

Hello!! I have a new tank with a juvenile Oranda and a Ryukin. I've had the fish for about 3 weeks, and the tank has been running for about 6 weeks and everything has been perfect until a couple of days ago. I noticed the Oranda looked to be missing scales but they almost look like they're just...

A few weeks ago I was able to buy some fish for my future large tank and I was hoping some of you would have some suggestions. As of right now I have a 2" black ghost knife fish with 2 delhezi bichirs (3-4"), 1 Senegal bichir (2"), 2 rope fish (12"), 1 giant Danio (2.5"), 1 dojo loach (5") and 1...