It starts with a white discoloration very close to the tail fin, but still on the body. It does not look like any of the many pictures of NTD that I have looked at already which begin with a discoloration near the dorsal fin. The color does not appear to look like a growth, it looks like the red is just changing into white. They can live for weeks while they slowly become more white. They eat and shoal normally until their bodies become deformed and they eventually die. I have tried full treatments of Maracyn 1, 2, and kanaplex. I have tried to take some pictures but they're just too fast. I may try for a video.