my sister just bought a figure eight puffer about 3 weeks ago. hes been doing fine and then 2 days ago, one of his fins are solid white and barley hanging on and he has a white haze over one of his eyes. It dosnt look like a parasite, or fin rot, or even fungus really. Im not certain what the disease is, therefor i cant treat it. If anyone can tell me what this might be i would greatly appriciate it. He looks to be swimming fine though. Thank You very much.