I'm still trying to rehome this pretty girl (guy?), if any of you are interested....
About a week ago she started developing orange blotches - at the base of her tail, and some sort of on her sides. The blotches seem to be mirrored on both sides. They're not dark orange, just barely visible with the bright lights on. She still extends all of her fins, swims, eats fine. She exhibits no unusual behavior. It occurred to me that I'd changed their food about the time the blotches started showing up. I got some of their "usual" food Friday, and I think the blotches are fading. I normally feed whole, frozen food like mysis shrimp and the paper-like marine algae. The food I suspect might have caused the orange blotches is a combination of several foods, pureed and frozen, and is a dark brown. This fish is a voracious eater - eats anything and everything. Could food be causing the orange blotches?