How long doe sit usually take an Auratus to change color? One of mine has gone from the dark yellow and black to almost a yellow white and dull brown stripes, sometimes i can see a faint blue all around his body. Im assuming he is male and has been this color for about 2 or 3 months now. He only gets darker when i drop frozen brine shrimp inside the tank. Could he be a sick female or just sick?