I know that as RES get up there in age, that their red stripes darken. But today I was talking with some folks about an RES my friend found in the wild. One person mentioned that their stripes fade if they are too cold or "starving" (she meant haven't eaten for a long time). Has anyone heard of this? Is this even true?
To me it seems odd but I don't know everything there is to know about RES and other sliders.